Gelatinous Cube
Large natural beast (blind, ooze)
Level 5 Elite Brute XP 400

HP 156; Bloodied 78Initiative +4
AC 17, Fortitude 18, Reflex 16, Will 15Perception+3
Speed 3, climb 3Blindsight 5
Immune blinded, gaze effects; Resist 5 acid
Saving Throws +2; Action Points 1

Traits

Ooze

While squeezing, the ooze moves at full speed rather than half speed, it doesn’t take the -5 penalty to attack rolls, and it doesn’t grant combat advantage for squeezing.

Translucent

The cube is invisible until seen (Perception DC 25) or until it attacks. A creature that fails to notice the cube might walk into it, automatically being hit with engulf.

Standard Actions

Slam (acid) At-Will

Attack: Melee 1 (one creature); +8 vs. Fortitude

Hit: 2d6 + 9 acid damage, and the target is immobilized (save ends).

Engulf (acid) At-Will

Requirement: The cube must have no more than two creatures grabbed

Attack: Melee 1 (one or two creatures); +8 vs. Reflex

Hit: The cube grabs the target (escape DC 15) and pulls the target into its space. Until the grab ends, the target takes ongoing 10 acid damage and is dazed. When the cube moves, it pulls with it any creature grabbed by it, and the creature remains grabbed and within the cube’s space. This movement does not provoke an opportunity attack from the grabbed creature.

Str 14 (+4)                Dex 14 (+4)                Wis 13 (+3)
Con 18 (+6)                Int 1 (-3)                Cha 1 (-3)

Alignment unaligned        Languages -
Update (8/19/2011)

Published in Monster Manual, page(s) 202, Dungeon Magazine 169, page(s) 13, H1 Keep on the Shadowfell, page(s) 70, Monster Vault, page(s) 222, Dungeon Magazine 193.