gelatinous cube 

A dungeon-dwelling monster invented for the game "Dungeons and Dragons." An enormous toxic blob, it fills any space it inhabits and digests all organic material it encounters.

Dude, my level 13 elf fighter-mage was totally eaten by a gelatinous cube.

gelatinous cube by Evan Harper August 30, 2009

Gelatinous cube 

A living cube of ooze that engulfs everything. Sounds better when you say it in a British accent.

Hym "They're like a gelatinous cube. They engulfed us."

Iam "Heh, I suppose we need to use an instant or a sorcery card to get ourselves out"

Hym "Ha! I suppose we do! But if they're running blue/black they probably have a bunch of counter cards."

Gelatinous cube by Hym Iam April 28, 2022