Sapphire Jelly

Medium ooze, unaligned

Armor Class 9
Hit Points 144 (17d8 + 68)
Speed 30 ft.

16 (+3) 8 (-1) 18 (+4) 3 (-4) 12 (+1) 12 (+1)

Saving Throws Wis +4, Cha +4
Damage Immunities cold, poison
Condition Immunities blinded, charmed, deafened, exhaustion, frightened, poisoned, prone
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 11
Challenge 6 (2,300 XP)


  • Amorphous. The sapphire jelly can move through a space as narrow as 1 inch wide without squeezing.
  • Icy Transformation. A humanoid slain by the sapphire jelly rises 1 week later as a glacial corrupter (see page 176), unless the humanoid is restored to life or its body is destroyed.


  • Multiattack. The sapphire jelly makes two freezing slam attacks.
  • Freezing Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 10 (2d6 + 3) bludgeoning damage plus 10 (3d6) cold damage.
  • Engulf. The jelly moves up to its speed. While doing so, it can enter a Medium or smaller creature’s space. Whenever the jelly enters a creature’s space, the creature must make a DC 15 Dexterity saving throw. On a successful save, the creature can choose to be pushed 5 feet back or to the side of the jelly. A creature that chooses not to be pushed suffers the consequences of a failed saving throw. On a failed save, the jelly enters the creature’s space, and the creature takes 10 (3d6) cold damage and is engulfed. The engulfed creature can’t breathe, is restrained, and takes 21 (6d6) cold damage at the start of each of the jelly’s turns. When the jelly moves, the engulfed creature moves with it. A sapphire jelly can have only one creature engulfed at a time. An engulfed creature can try to escape by taking an action to make a DC 15 Strength check. On a success, the creature escapes and enters a space of its choice within 5 feet of the jelly. Alternatively, a creature within 5 feet of the jelly can take an action to pull a creature out of the jelly. Doing so requires a successful DC 15 Strength check, and the creature making the attempt takes 10 (3d6) cold damage.


Wisps of frosty air rise from the amorphous, quivering blue puddle. Bits of ice cling to the edges, and the surface has an almost crystalline appearance.

Mountainous Regions. Sapphire jellies are at home in glacial and mountainous regions among rocks and ice. They are just as likely to be found above-ground as below, but they avoid regions that are warm or dry. They tend to avoid large settlements of warm-blooded creatures, as such creatures consider them an active threat and often seek to destroy them. They prefer the company of creatures not bothered by the cold.

Unnaturally Cold. Sapphire jellies are extremely cold, freezing water and objects they encounter on contact. Creatures that are caught within them or hit with their attacks are immediately chilled to the bone, and those who are killed by them are permanently transformed into undead. Sapphire jellies can often be found in areas with glacial corrupters, which more often than not were once their victims.

Ooze Nature. A sapphire jelly doesn’t require sleep.

Section 15: Copyright Notice

Tome of Beasts 2. © 2020 Open Design LLC; Authors Wolfgang Baur, Celeste Conowitch, Darrin Drader, James Introcaso, Philip Larwood, Jeff Lee, Kelly Pawlik, Brian Suskind, Mike Welham.

This is not the complete section 15 entry - see the full license for this page