Cathulhu

Cathulhu is a massive humanoid reptilian beast, though his head takes the form of a giant octopus. He is considered as one of the most powerfull villains in the television series, Ghostbusters. Based on the actual myth of the Cthulhu monster, Cathulhu is an immortal being, though he has limits against magic. Cathulhu is a secondary player in Non-Disney Villains Tournament.

Non-Disney Villains Tournament
Cathulhu is summoned by Nergal, on purpose to aid the Triumvirate of Terror to their goals.