Monster Analysis: Devils of the Jailbreak

The prison of Mentiri hosted many devils, all whom shared an eagerness in their duties to inflict punishment on those in their tender care. On their way in, Vox Machina were given a grand tour of the devils that busied themselves there, but did not have to worry about fighting them until they managed to break out of their cell.


Before they could start their search for Hotis, Vox Machina had to put their faith in the contract Percy signed with Ipkesh. They allowed themselves to be locked up without incident, not that they could have tried anything, what with being manacled. What greeted them was a huge, masochistic chain devil.

Krix: Large Chain Devil

  • Appearance: 93 Bats Out of Hell
  • Average Chain Devil Armor Class 16
  • Darkvision 120 ft, Passive Perception 11
  • Speed 30 ft.
  • Resistant to cold and nonmagical, nonsilvered physical damage
  • Immune to fire and poison damage
  • Suggested Average, Max HP: 85, 120

Chain devils, as Vox Machina learned from the barbed devil shopkeep, do much of the torture work of the Mentiri prison. They have a built-in ability to restrain their foes with their attached chains. The particular devil that was set to “loosen [Vox Machina’s] load” was much bigger than those they had seen up to this point. An average chain devil can use four chains on its turn; this devil had “dozens” at his disposal, more than enough to handle a group of seven adventurers.

Luckily, Ipkesh came through on his end of the bargain and had one of the barbed devils (one rank lower than a chain devil) in his employ find an excuse to get Krix out of the room. The barbed devil dumped their equipment on the floor, hastily gave them directions on how to find Hotis, and left just as quickly. Thanks to creative thinking, VM freed themselves of their manacles, turned into bats, and began their flight through the halls of the Bastion of Flesh.

What their bat forms lacked in hit points, they made up for in darkvision and stealth. Though bats are not native to the Hells, the rodent forms were small and dark enough that they didn’t draw too much attention early on, allowing the party to get fairly far into the prison before encountering resistance from spined devils and a bone devil.

Spined Devils and Bone Devil

Spined Devils

  • Encounter Appearance: 93 Bats Out of Hell
  • Armor Class 13
  • Darkvision 120 ft, Passive Perception 12
  • Speed 20 ft, Fly 40 ft
  • Resistant to cold and nonmagical, nonsilvered physical damage
  • Immune to fire and poison damage
  • Suggested Average, Max HP: 22, 35
  • SD1 took 23, SD2 took 30, SD3 took 38

Bone Devil

  • Encounter Appearance: 93 Bats Out of Hell
  • Armor Class 19
  • Truesight 120 ft, Passive 12
  • Speed 40 ft, 40 ft flying
  • Resistant to cold and nonmagical, nonsilvered physical damage
  • Immune to fire and poison damage
  • Bone Devil took 127 damage (24 killing blow by Grog)

Spined devils are small creatures, ranked just above imps in the devil hierarchy. They are not very powerful, at a mere Challenge Rating of 2, and dealt at most seven damage per strike. However, their flight speed granted them a pursuit advantage over bats, meaning that they had ample opportunity to attack. Their tiny damage was still threatening enough to revert the fleeing party’s bat form. Combined with the bone devil’s higher damage dealing, VM’s dedication to staying as bats, and their need to fly together so no one got lost, every simple attack whittled away Keyleth’s hit points to the point of unconsciousness.

In their rush to put distance between them and their potential pursuers, Vox Machina forwent resting or healing, so an encounter that could have been no more difficult than their previous disposal of the bone and bearded devils proved nearly TPK-level deadly. The round of attacks this particular group of devils got off on Keyleth had a roughly 10% chance of killing her outright, thereby stranding the party in the depths of Mentiri with a host of devils on their tail (outside of Deck of Many Things or soul-selling shenanigans). Once Vox Machina ensured that Keyleth was conscious and not on the brink of death, all three spined devils were disposed of rapidly by Percy, followed in short order by Grog’s smashing of the bone devil.

Once the party dealt with the immediate threat, Tary bought enough time for the party to confront their final target by placing an illusionary chain devil to misdirect pursuers. With this small amount of time, Vox Machina entered their final encounter in the Mentiri Prison (To be continued)!