Frontier Sentinels. Worlds Greatest Heroes
Glabbagool is a gelatinous cube. He seems genuinely curious about the outside world and not as evil as the rest of the oozekind.
Glabbagool is the name the newly sentient and aware ooze has chosen for itself. The ooze seems genuinely curious about other creatures and wants to learn more about the world, so it is not aggresive as the rest of its species. It resides in an ancient temple of Juiblex, the demon prince of oozes, along with many variants of it’s kind. When the group known as Frontier Sentinels met him in the deep shrine he kept the rest of the oozes at bay while helping them escape before the temple was fully sunk.