Brain in a Jar in Dungeons & Dragons 5e
Homebrew, Ravenloft: Horrors Within (5.5e) 2026, Van Richten's Guide to Ravenloft (5e) 2021
Brain in a Jar CR: 3
STR
1 -5
DEX
3 -4
CON
15 +2
INT
19 +4
WIS
10 +0
CHA
15 +2
Blindsight 120 ft, Passive Perception 10
Innate Spellcasting (Psionics). The brain's innate spellcasting ability is Intelligence (spell save DC 14, +6 to hit with spell attacks). It can innately cast the following spells, requiring no components:
- At will: Detect Thoughts, Mage Hand, Zone of Truth
- 3/day each: Charm Person, Hold Person
- 1/day each: Compulsion, Hold Monster, Sleep (at 3rd-level), Tasha's Hideous Laughter
Detect Sentience. The brain can sense the presence and location of any creature within 300 feet of it that has an Intelligence of 3 or higher, regardless of interposing barriers, unless the creature is protected by a Mind Blank spell.
Magic Resistance. The brain has advantage on saving throws against spells and other magic effects.
Unusual Nature. The brain doesn't require air, food, drink, or sleep.
Actions
Multiattack. The brain makes two Disrupting Burst attacks.
Disrupting Burst. Melee or Ranged Attack Roll: +6, reach 5 ft. or range 120 ft. Hit: 11 (2d6 + 4) Psychic damage. The target can't take Reactions until the end of its next turn, and it has Disadvantage on saving throws to maintain Concentration until the end of its next turn.
Mind Blast (Recharge 5–6). Intelligence Saving Throw: DC 14, each creature in a 60-foot Cone. Failure: 14 (4d6) Psychic damage, and the target has the Incapacitated condition until the end of the brain's next turn. Success: Half damage only.
Suggested Environments
Any climate; Urban terrain
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