5e: Infamous Adversaries – a review.

Adversaries

5. Archibald Sinister (CR 3 Elemental) is an unusually intelligent gargoyle who guarded a Zhentarim college of wizards until it was attacked by agents of the Harpers. He is now on a quest for vengeance against that organisation which has taken him to Waterdeep. Sinister’s statblock is only slightly different from a regular gargoyle, though he can summon mephits. What makes him special is that although he isn’t a legendary creature, he has the unique ability to rapidly establish a lair wherever he is by making contact with cut and worked stone. This is a very cool mechanic that makes him a particularly dangerous hunter on the rooftops and in the alleys of Waterdeep. A missed opportunity here is that although Sinister’s lore tells us he enjoys using wordplay to trick people, this characteristic is not reflected by a Deception skill nor a unique feature in his statblock. 

6. Ausroc (CR 13 Monstrosity) is an intelligent variant roc called the “faux-phoenix”. It chooses to live in volcanic areas, where it can take advantage of magma flows to set fire to logs which it can drop on prey. There’s not much more to say about this one: the ausroc’s unusual intelligence and tactical savvy, along with burning log drop feature, are its unique selling points. 

7. Baxter Brundle (CR 5 Humanoid Shapechanger) is a classic self-experimenting mad scientist. His initially well-intentioned research on lycanthropy escalated to an obsession and has resulted in him becoming the world’s first werestirge. With an arsenal that includes unique lycanthropic abilities, stirge allies, wizard spellcasting, as well as legendary and lair actions; Brundle is a formidable encounter for characters reaching the end of the heroic tier. This section includes an additional Swarm of Stirges statblock.

Baxter Brundle

8. Beast of the Eternal Blaze (CR 5 Fiend Shapechanger) is a unique fiendish wereboar. The Beast is a violent and sadistic killer, but is also looking for a soul evil and foolish enough to consume the Beast’s heart, which is the method by which the fiend prolongs its stay on the Material Plane. Aside from the combat abilities you’d expect from a wereboar, the Beast is also able to hurl hellfire and use legendary actions. One of the latter is a fun ability called Number of the Beast, which deals 6d6 + 6 (get it?) fire damage and curses the target with disadvantage on its attacks.

9. A Black Nightmare (CR 6 Monstrosity) is an extremely large displacer beast which becomes master of its pride and leads them on aggressive campaigns against blink dogs and humanoids near its territory. This is one of the less interesting monsters in the book, as it really is just a bigger, tougher version of the standard displacer beast. It does get legendary actions, but they’re the default detect, move, and attack. 

10. Cheddar (CR 1/4 Beast) is a rat who was awakened by a druid and has since embarked on a life as crime, forming a thieves guild named the Cheesemongers. With the ability to call rat swarms with his legendary actions and summon bandits or trigger traps with his lair actions, Cheddar is a much nastier boss than his CR would suggest if he’s played correctly. In theory Cheddar and his guild would be best suited for some comic relief in between more serious adventures, but owing to his low CR that might not be practical without buffing him. My suggestion is to build an adventure around him next time you need to run a one-shot! 

11. Chief Klanklack (CR 8 Humanoid) is a kobold who stumbled upon a workshop left by a modron which was once stranded on the material plane. After learning how to control some of the workshop’s wonders, she used the automatons she reactivated to unite the kobolds in the region. Her minions are equipped with mechanical gadgetry that allows them to terrorise other humanoids in the area. Klanklack wears what is essentially magical power armour, complete with a beam (read: laser) cannon, a flamethrower, and a lightning whip! She also has some great lair actions involving reinforcements and mechanical traps. Klanklack and her tribe ought to be extremely fun for the DM to run: Tucker’s Kobolds meets magipunk. 

12. Dione the Beautiful (CR 10 Giant) is a vain cloud giant who made a fiendish pact to eternally secure her beauty, only to be inflicted with a curse that turns creatures to stone. While she may not be wildly original, Dione serves as an excellent example of how to take two monsters (in this case, the Cloud Giant and the Medusa) and combine their statblocks together into something new. She also has legendary actions, which she can use to attack and cast spells.

13. Ebonbeak (CR 7 Monstrosity) is billed as the “original owlbear”, a monstrosity fueled by its hatred of the wizardry and magic which created it. It has been hibernating since who knows how long, but its sleep has been disturbed and it is very, very angry: woe betide any arcane spellcaster caught in its path! Take an owlbear, make it bigger and tougher, give it extreme resilience towards magic (especially arcane magic), and add a handful of innate spells and a thunderous screech legendary action. That’s Ebonbeak! He ought to be a fun little encounter, though might be frustrating for the party spellcasters (of course, that’s the point). What I like best about him is the way he playfully expands on the lore of an iconic creature.  There’s also a fun new spell here that combines two beasts into one creature, and a bonus statblock of one example: the Mulelion. As an aside, reader, I happen to sell a product that lets you create hybrid beasts like the owlbear. It would pair very nicely with adventures involving this particular adversary and the wizard who created it! And it happens to be reduced by 50% until the end of October! 

14. Enlightened Piercers (each a CR 1 Monstrosity) are crystalline piercer that resembles quartz and have unprecedented intelligence and cunning for their kind. Their numbers and intelligence are growing with each successive generation. Conceptually, these monsters rely on the notion that crystals have inherent psionic properties. If you’re familiar with psionic lore from previous editions that’s a given, but since we don’t have official psionics support in Fifth Edition yet I think this connection could have been made clearer in the text for the benefit of newer DMs. Individually the enlightened piercers are quite weak. In fact, there’s only a little in their statblock to separate them from a regular piercer. What makes them unique is the fact that they lair in groups called clutches, and each enlightened piercer in the clutch’s lair can take advantage of a lair action each round, for 8 lair actions total. A combination of stun effects and hide bonuses in the lair actions could make this encounter a lot more threatening than it looks at first blush. There’s also no reason you can’t increase the immediate threat by increasing the size of the clutch the characters encounter, or the long term threat by spreading multiple clutches throughout the underdark.

15. The Eye of Frost (CR 14 Beholder, or 15 in its lair) is a variant beholder with ice-themed powers: its central eye emits a cone of cold energy rather than antimagic, and several of its eye rays replace a beholder’s normal effects with icy alternatives. Eye of Frost can also take advantage of some great ice-themed lair actions that change the landscape of the battle.

16. The Giant Crawling Claw (CR 3 Undead) is the horrifying guardian of the island lair of a coven of three sea hags. Aside from its size what sets this creature apart from a standard crawling clear is its ability to leap large distances, which is a pretty horrifying image. To be honest, I think the designers should consider beefing it up a bit more if they ever revise the book. The three sea hags that made it are each worth CR 4 because they’re part of a coven, which means a party capable of dealing with them will trivialise their supposed guardian. As it stands, I would either use more than one of these things or consider creative alternative lore. 

17. Grand Sabaar (CR 11 Plant) is a huge saguaros cactus that has been awakened through exposure to ambient magic. It has powerful physical attacks and an extremely nasty needle attack that deals d100 damage! It can also split into smaller creatures when damaged by slashing weapons, much like an ooze does. Grand Sabaar is the first of these adversaries to have a good alignment. Normally this is a tricky quality when designing a monster for publication because a full statblock for a creature that most parties are more likely to talk to than fight might be considered wasted space. In this case, the scenario hook sets events up so that the characters are likely to antagonise Grand Sabaar before they realise it’s not a mere plant. They still might be able to apologise and talk their way out of any additional unnecessary aggression, but that depends on them. 

18. The Jabberkoth (CR 16 Undead, but with scaling guidance for CRs 13, 9, 6, or 4) is perhaps best described as a zombie dragon, the result of a dracolich ritual gone awry. There’s a lot of story potential in this adversary, because the mind of the good dragon who was the victim of the Cult of the Dragon’s ritual is still in there somewhere. Dealing with the Jabberkoth could involve as much a social interaction as combat encounter—probably at the same time! The Jabberkoth has a rotting breath that deals necrotic damage and can raise creatures it kills as undead. This breath weapon is all the more dangerous because it can be used again as a legendary action, and any targets close to the Jabberkoth become vulnerable to necrotic damage due to its aura of decay! A useful sidebar provides guidance on how to adjust the Jabberkoth to lower CRs. 

19. Kranklob’Obgund (CR 9 Monstrosity on her own, but usually part of an encounter equivalent to a CR 19 creature. Guidance is given for alternative encounters equivalent to CRs 13 or 21) is an oversized roper which migrates through the underdark carrying her smaller roper and piercer children. She has a hatred for drow and prefers to eat them. However, since she can’t tell drow and other humanoids apart, her actual hunting is indiscriminate. Kranklob’Obgund is fundamentally just a much bigger and more dangerous version of the roper, but this does give her the ability to swallow creatures whole. Furthermore, one of her legendary actions allows her to hurl a piercer up to the ceiling, from where it will be able to make another attack. Encounters with her family are likely to be nasty affairs!

20. Leda Altmar (CR 5 Fiend) is a courtesan with fiendish powers owing to a heretofore unknown diabolic heritage (she thinks she is a tiefling, but is actually a cambion). Leda is a classic manipulator villain, pulling strings and ensnaring the player characters in her machinations from a distance for as long as possible. Her statblock resembles that of a typical cambion with a few changes, the most significant of which is a feature which allows her to charm creatures for an extended period of time if they have already fallen prey to the fiendish charm action multiple times previously. Obviously it’s up to you to decide what NPCs are already victim to this extended charm effect, but it could be a genuine threat to player characters too if they fall victim to her tricks enough times over the course of a campaign!

21. The Leechking (CR 6 Monstrosity) is a nightmare made flesh: check your players won’t be triggered by this wriggling horror! Technically, the leechking is a swarm of leeches that have mutated and formed a hive mind, but they can wriggle together into a larger form made from the swarm collective. The design of this creature is handled sensibly, as it’s  got the same challenge rating and posesses legendary actions in both its swarm and “golem” forms. Its hit points carry over when it transitions between forms. I prefer the swarm form since the devour and envelop actions are so scary, but the size of its golem form grows as the leeches are fed (ie. when they reduce a creature to 0 hit points), which introduces a fun mechanic. Small quibble: in my opinion the rules for this growth really ought to be described in a within both statblocks, not the Tactics section. I would argue that I only want to read the Tactics section in advance of the fight, and if I need to look anything mechanical during the fight it should all be in one place.  

22. Liu Shui (CR 8 Undead) is a revenant who seeks revenge on the couple that drowned her, but is thwarted by their magical protections. Driven mad, she has taken to attacking innocents who venture too near the site of her drowning. The hook provided suggests that the party be hired to kill Liu Shui, so whether they ever find out the true story will depend very much on the party! Whether they learn that they’ve been duped or not, they’ll attain excellent rewards for resolving the matter.  Liu Shui has some unique features for a revenant themed around her connection to water: she can teleport to bodies of water, and has an action to drown a creature and take its body for her own. 

23. Madadh (CR 5 Fiend, but with scaling guidance – note that the CRs of the scaled versions are not given) is a powerful three-headed hellhound who was bred to guard a portal from the Nine Hell to the Material Plane, but has slipped his leash and is causing havoc across the countryside. The hook provided has the adventurers approached and hired by an imp named Beag who is responsible for Madadh. They can either kill the hellhound or return it through the gateway, with different rewards associated with each approach.

24. Madcap Mraz (CR 6 Humanoid) is a goblin who accidentally consumed fungi that had absorbed nutrients from an ooze. He began seeing visions from Ghaunadaur, god of mad abominations. He now leads a monstrous army to spread ruin and madness in his master’s name! Mraz combines the features of a goblin and a cleric, and he is equipped with a magical staff that shares the property of a gray ooze to dissolve armour. If encountered in his mushroom-overgrown throne room he has oozes and goblins at his command, and has lair actions to cause mushrooms to explode in a cloud of blinding spores, as well summon goblin fanatics (a statblock is provided for this creature).

Madcap Mraz

25. Margrim (CR 7 Monstrosity) is a legendary version of the bulette, with some nasty multiple target options on its legendary action menu. Burrowing Assault in particular has a cool visual, with Margrim burrowing underground and attacking a line as it passes.

26. The Mirrorborn (CR 5 Monstrosity Shapechanger) are a cautionary tale against spending too long in front of a mirror. They’re variant doppelgangers that dwell within mirrors and become obsessed with a particular person whose life they attempt to claim. They can only shapechange into the form of their obsession. They can walk through mirrors (pair them with a hall of mirrors to increase their tactical options!) and as a legendary action use abilities and attacks that belong to the subject of their obsession.

27. Neith-Arach (CR 4 Monstrosity) is shudder-some if you’re an arachnophobe. A deadly giant spider created by drow Lolth worshippers, she has many arachnid minions and the ability to charm her prey into walking straight to their doom. In my opinion she should be an excellent and memorable encounter, but I think there’s a missed opportunity here by not including a web-themed set of lair actions. Might be something you’d want to whip up for your own game!

28. Nocri Dragonwing (CR 4 Dragon, or 5 if she has laid her egg) is a unique draconid somewhere between drake and true dragon, born out of mysterious circumstances unknown even to her. Her kobold minions grow bolder as they gather treasures for her hoard along with other, stranger items to satisfy Nocri’s increasingly erratic cravings. Unbeknownst to Nocri, she is about to lay an egg. Nocri’s most unique feature as a leader of monsters is her protective instincts, which allow her to protect her allies. She can also fly into a Barbarian-like rage if her egg is harmed.

29. Ondual (CR 18 Celestial) is a Planetar angel who fell to corruption and has embarked on a personal quest to quash the forces of evil among mortalkind, no matter what unseemly actions it must itself take to achieve its ends. After taking control of a fort on the Sword Coast, Ondual intends to expand his influence across Toril and take charge of mortalkind to save them from themselves. To me, Ondual is one of the stand-out villains of IA, his good intentions twisted by millennia of ceaseless and thankless toils against the forces of opposing alignments and the foolish fickleness of mortals. His unique powers are themed around oppression and tyranny, which means events in play might be triggering for some players. Handle him with care, and he ought to be one of the most memorable villains of your campaign. 

30. Reijla (CR 5 Fiend Hag) is a night hag who has made a pact with Dendar the Night Serpent, a primordial whose portfolio is nightmares. Dendar featured in the last campaign I DMed and a recent campaign I played in, so I have a soft spot for her which immediately elevates Reijla to among my favourite adversaries in this book. It helps that his backstory is creative and his scheme grand and terrible: he uses sand from the Demiplane of Nightmares to corrupt mortals dreams and kill them in their sleep.  This feeds Dendar but also allowing him to lay claim to their souls when they arrive in the Nine Hells, empowering both of them. Reijla is based on the night hag statblock, but he can summon chain devil mercenaries and cause nightmares. If you move his killing spree to Baldur’s Gate Reijla would be a good side-quest for characters in the Descent into Avernus campaign: you could have them stumble into his schemes before they leave Baldur’s Gate. If not dealt with at the time, they might get a second chance when they encounter Reijla directly in Avernus.      

31. Scarlet Stone-Eater (CR 2 Monstrosity) is bigger than your average cockatrice, and her name suggests she’s developed the extraordinary ability to eat stone. That naturally pairs very well with a cockatrice’s natural capacity to turn a creature to stone, which has become the Scarlet Stone-Eater’s hunting strategy as opposed to merely a defensive mechanism. Her geovore ability (“consumer of stone”, if like me you’re not up on your latin) does double damage against stone which means Scarlet Stone-Eater is a sort of hyper-specialised Siege Monster. In my mind’s eye I see an encounter where a low level party are barricaded into a cottage and she starts tearing through the wall. The Scarlet Stone-Eater also gains a screech ability. Interestingly enough, instead of thunder damage (the usual choice for sonic attacks) this deals psychic damage and disadvantage on saving throws vs petrification). A magical screech, then!

32. The Sea-Ambling Mound (CR 5 Plant) is a shambling mound that has adapted to hunting underwater, and plagues the boats of fisherfolk! Its preferred hunting ground means it has the option of drowning a creature it engulfs, and its long survival and experience of fighting humanoids has taught it to disarm creatures it engulfs to make them more vulnerable should they escape its grasp. 

33. The Spell Eater (CR 2 Monstrosity) is a rust monster which has become warped by consuming a vein of iron ore contaminated by the magic of a decaying mythal. It has grown to unusual size and gained the capacity to feed on magic itself. This monster is conceptually very cool, and its mechanics are strong: when it “eats” magic it does so by functionally casting dispel magic and gaining temporary hit points. It can un-attune magic items by draining their magic through contact. All well and good, and a nasty encounter to be sure! Even so I’m left slightly disappointed that despite the implication that this monster is very dangerous to magic users, they actually suffer less than martial characters. Why is that? Well, it’s still a rust monster so nonmagical weapons and armour can still suffer the normal rusting effects of a rust monster. On top of this, a martial character’s magic weapons have a 50% chance of being un-attuned every time they attack. For martial characters, weapons and armour are an essential part of their function and penalties to their use are painful. I had hoped that this monster would be similarly punishing for spellcasters, but they get off comparatively lightly since whatever equipment they lose they still have unfettered access to their magic. Yes, that magic might be dispelled, but having it dispelled after you cast it has no long-term effects on core functionality the way losing equipment can for a warrior. Maybe it should go after spell focuses and component pouches?  

34. Tenser’s Experimental Armor (CR 20 Construct) is what happens when an archmage’s experimental spells go horribly wrong. There’s some real fun lore attached to this one, illustrating the possible consequences when a mage even of Tenser’s caliber tries to create a new spell. The armour is a sentient magic item which is treated as a construct. It is worn by an unwilling dwarf who the armour has been forcing to learn wizardry with the ultimate goal of recreating the conditions in which it were made and thus forming an army! The armour is animated so capable of fighting on even without a wearer, but figuring out a way to help the dwarf escape would take away its access to spellcasting and vastly simplify things.

35. Varesso Isaro (CR 5 Undead) is a wight, I believe (it’s not spelled out in the text, but contextually it seems appropriate). I really like his background, which is that of a naive officer who conquered on behalf of a corrupt authority, then was executed for war crimes after a regime change. Glowing flowers bloom where he walks, a magical echo of the flowers he planted in the wake of his conquests while alive. Though Varesso and his gathered undead conquer indiscriminately now, he recognises settlements that have architecture resembling his former homeland as allies and will even come to their protection, giving you plenty of scope for interesting engagements. I think Varesso would make a great antagonist for a short arc, except for one thing: there’s a gotcha here that might catch out inexperienced Dungeon Masters. Namely that as written, his honour won’t allow him to escape from battle: tactically retreat to another location to set up an ambush yes, but not escape the battle altogether in order to survive and fight another day. This is a characteristic that means you should expect the player characters to defeat Varesso shortly after encountering him in battle, if not right then and there. At best I wouldn’t expect him to survive the adventuring day. If you’d like to have him recur for a while you’ll either need to get creative or remove this particular trait. 

36. The Venus Hydrap (CR 10 Plant) is a legendary carnivorous plant monster created by a non-traditional mad scientist type: a gardener! Its creation was meant to be the solution to a gopher infestation, but it’s out of control. The Venus Hydrap has two heads and can grow more when the existing ones are cut off (Venus Flytrap + Hydra, get it?).

37. The Vorpal Flying Sword (CR 8 Construct) is exactly what it sounds like: an animated vorpal longsword. In this case, the sword is imbued with a bloodthirsty intelligence. Be wary of this monster: players have fun when they get to instantly behead a monster; they’re likely to have a lot less fun when it happens to them. It’s equivalent to the Save or Die effects from 3rd edition which Wizards of the Coast have been careful not to replicate in 5th. For this reason I’m not sure I’d personally use the Vorpal Flying Sword and question the sense of its inclusion. If I’m wrong and there are groups that might enjoy this monster, then in my opinion it should at least be re-balanced to a higher CR because its current rating is likely to cause more drama at the table. CR 8 looks like a monster characters might face at around 5th or 6th level, but I would only consider this monster somewhat safe to use if my players had access to raise dead, which becomes available at 9th character level at the earliest). If you choose to use the Vorpal Flying Sword, consider referring to the monster creation guidelines in the Dungeon Master’s Guide and buffing it to around CR 11 or 12.

38. Wyrmslayer (CR 16 Monstrosity) is unusually cunning and mighty manticore which has developed potent abilities for fighting and slaying dragons. Her children, wyrmslayer spawn, inherit many of these characteristics. Compared to some of the other monstrosities in this book I really like Wyrmslayer as she is an intelligent entity capable of short-term strategy and long-term goals. While the provided hook positions her as an enemy (the characters are requested to aid a silver dragon), there’s potential there for more complex relations: after all, she’s killing chromatic dragons, too. 

39. Zuphrezask (CR 14 Aberration) is a unique mind flayer. Traditionally, the illithids can only create more of their kind by transplant one of their tadpoles into the brain of a humanoid creature. Clearly a group of illithid have been experimenting, as they’ve created a unique mind flayer ogre. Zuprezask leads a heretic cult of Thoon and attacks other illithids. It might seem wise to just leave him to it, but surviving mind flayers and their servants are dispersing out through the underdark, creating a ripple effect of disruption and displacement that even reaches the surface. Plus, he believes by consuming “quintessence” from brains he can become a god: what happens when he runs out of mind flayers and moves on to other peoples? And what happens if he’s right?

Zuphrezask

40. Zyldrohar (CR 30 Construct) is the last adversary in the book, and fittingly its most powerful. I mentioned earlier that I hoped one of the adversaries would actually reflect the monster on the cover: well, this is that adversary! Don’t expect any swarm-like abilities from all those ravens seen in the art though. There are no mechanics related to these birds, they’re simply a part of the monster’s lore and aesthetic: They’re constantly swarming around it, pecking at its flesh. Zyldrohar is end of the end-game, apocalyptic level dangerous, and indeed that’s the hook that goes along with this monster: powerful, trusted oracles are predicting that all life comes to an abrupt end within a year. Depending on how quickly you like characters to level in the context of in-game time, you can build your entire campaign or at least a good chunk of it around the coming of Zyldrohar. In combat, Zyldrohar is extremely nasty as you’d expect from a CR monster. It’s harmful just to stand in its vicinity, its an extremely potent spellcaster, it becomes twice as tough after being reduced to half hit points and when it hits zero hit points… well, let’s just say one turn of sheer insanity happens before Zyldrohar is truly defeated. Even in claiming victory for the world, the player characters and anyone else fighting with them may find themselves suffering personal defeat. Those are damned epic stakes, but the likely mixed outcome may leave some players feeling cold so you may wish to give them the opportunity to learn about Zyldrohar’s powers over oblivion and make preparations to lessen the effects on themselves and their allies. 

Phew! That’s a lot of adversaries. As you can see there are a lot of fun monsters in IA. Even if you only find a use for one or two in your current campaign, apply that expectation across all your future Fifth Edition campaigns and it becomes clear just how much value you can get out of this content. 

Rewards

The rewards for defeating a given adversary are a real highlight of this book: they are fun and are in many cases very creative. I’m not going to summarise every rewards the same way I summarised the adversaries because there would be so much to write: there are generally multiple rewards associated with each adversary. The types of rewards are wildly varied and are thematic to the adversary with which they’re associated: there are magic items of course, but also alchemical concoctions, cooking ingredients, crafting materials, access to new lairs, and more. I particularly love the optional thematic spells! Rather than learning these from scrolls in a monster’s treasure hoard, these are presented as boons that the DM can award to any spellcasting player characters who participated in an adversary’s defeat! It’s a real fun concept. 

First, let’s look at the distribution of creature types in this book:   

Almost every creature type is represented, except one: fey. I’m really genuinely surprised by this. The tricky, scheme loving fey are practically adversarial to their very core and would have been perfect for this collection. Even leaving that aside, it feels like a missed opportunity not to include at least one fey and give each monster type representation. 

Monstrosities are over-represented, with 13 (or 33%) of the adversaries in this book belonging to the monstrosity type. I’m personally inclined to the opinion that most of the monstrosities, plants, and oozes in this book are ill-fit for the book’s premise—it’s not that they’re monstrosities, strictly speaking. It’s that they typically lack intelligence and therefore can’t take full advantage of the book’s format: their Tactics, Traits, and Next Moves sections don’t particularly inspire. Additionally the lore doesn’t always sell you on the notion that the creature is truly unique, and it may have only one or two new abilities compared to a normal creature of its type: when this happens you could imagine it appearing as a mere variant in any old monster collection, not helping to justify its inclusion among other more compelling adversaries. There are notable exceptions, such as Aethlin Adamar and Wyrmslayer, and these are the ones I’d personally have chosen to keep. In place of the others I would have liked to have seen a few more aberrations, giants, humanoids, and yes: fey. Possibly a true dragon wouldn’t have gone amiss, either.

The fact that I think some of the monsters don’t suit the collection should not leave you with the impression I dislike said monsters. As I’ve said, I’d simply see them fitting in better as part of a different bestiary.

I also want to take a look at the CR distribution of IA‘s adversaries. In the chart below, blue reflects the base CR of all 40 adversaries. Red reflects alternative CRs offered for any reason: be it a CR that applies when a circumstance changes (eg. when Nocri Dragonwing lays her egg), when scaled down variants are provided (eg. The Jabberkoth), or when the adversary is presented in one or more encounter configurations which are measured by CR (eg. Kranklob’Obgund).

I highly appreciate that some of the adversaries have scaling guidance as it makes them even more useful to more groups, but it’s a shame that the approach is inconsistent. For instance the guidelines for the Jabberkoth give the adjusted CR, while the guidelines for Madadh do not. Similarly, giving an “encounter CR” for Kranklob’Obgund may be useful, but this kind of approach to factoring in minions isn’t used elsewhere in the book. Similar inconsistencies occur in the handling of minion monsters: some adversaries include extra statblocks for their minions, while others simply list the necessary modifications to an existing statblocks.

I may not have spent as much time on the rewards for defeating adversaries as I did the adversaries themselves, but I really appreciated them as much as the monsters themselves. There are so many: in many cases, three or four per adversary. There is such a wide and creative variety. Some of the most fun are raw materials that can be harvested from the creature as well as spells that characters can learn through the creature’s defeat.