Bonebound Ice Slime

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Medium Ooze, Neutral Evil

Armor Class 15 (natural armor)

Hit Points 44 (8d8+8)

Speed 20 ft.

STR 16 (+3)

DEX 12 (+1)

CON 14 (+2)

INT 3 (-4)

WIS 10 (+0)

CHA 6 (-2)

Saving Throws Con +4, Wis +2

Skills Perception +3

Damage Resistances cold

Damage Immunities poison

Condition Immunities poisoned

Senses darkvision 60 ft., passive Perception 13

Languages Common

Challenge 4 (1,100 XP) Proficiency Bonus +2

Heat Vulnerability. The Bonebound Ice Slime takes triple damage from fire-based attacks.

Bone Scission. When hit by an attack that deals slashing or piercing damage, the slime sprouts bone shards in its interior. After a short moment, 1d4 skeletons emerge from the ice (see Death Burst); the skeletal fighters last for 1 minute or until reduced to 0 HP, then collapse.

Bonebound Regeneration. The slime regains 3 hit points at the start of its turn if it has at least 1 HP.

Skeleton Spawn (1/Day). When the slime drops to 0 HP, 1d4 skeletons rise from the interior debris within 5 feet and animate, acting on the following turns. They disappear after 1 minute or when reduced to 0 HP.

Actions

Multiattack. The Bonebound Ice Slime makes two Slam attacks.

Slam. Melee weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 11 (2d6+4) bludgeoning damage. A crushing strike from the icy mass.

Chill Burst (Recharge 5-6). The Bonebound Ice Slime blasts a cold wind in a 15-foot cone. Each creature in that area must make a DC 12 Dexterity saving throw, taking 18 (4d8) cold damage on a failed save, or half as much on a success. In addition, anyone who fails their save has their movement speed reduced by 10 feet until the end of their next turn.

Environment Arctic

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Lore & Description

Appearance

A translucent, pale blue ooze coils with shifting bone fragments trapped within. Its surface gleams like frost on a moonlit lake, and skeletal hands periodically press outward from the icy sheen as if trying to escape. Within the core, bones chime softly with every movement, as if a skeletal army is stirring beneath the surface.

Behavior & Origins

The Bonebound Ice Slime is a grimling of frozen crypts—an amalgam of ancient remains fused within an icy mass. It lures intruders with a deceptive calm, then erupts in brutal, bone-cracking force. Its interior skeletons crave freedom and will sometimes sprout during combat, turning the battlefield into a glacial ambush where cold fear and skeletal gnashing collide.

Monster Image

Generation Info

Original prompt:
"An ice slime filled with skeletons"

Created: Mar 3, 2026
Modified: May 22, 2026