Pseudopod

_Melee Weapon Attack:_ +5 to hit, reach 5 ft., one creature. _Hit:_ 10 (3d6) acid damage.

Engulf

The cube moves up to its speed. While doing so, it can enter a Large or smaller creature's space. When the cube enters a creature's space, the creature must make a DC 13 DEX save. On a success, the creature can choose to be pushed 5 feet back or to the side of the cube. A creature that chooses not to be pushed suffers the consequences of a failed save. On a failed save, the cube enters the creature's space, the creature takes 10 (3d6) acid damage, and is engulfed. The engulfed creature can't breathe, is restrained, and takes 21 (6d6) acid damage at the start of each of the cube's turns. When the cube moves, the engulfed creature moves with it.<br>An engulfed creature can try to escape by taking an action to make a DC 13 STR check. On a success, the creature escapes and enters a space of its choice within 5 feet of the cube.