The Slithering Doom is a humongous 500 kilometers tall dinosaur-like creature who comes under the "giants" category. It cannot talk, the only noise being capable of are slithering noises like the ones of a snake. Due to its size, these noises could potentially cause earthquakes around the creature. It arrived on Earth from the overlapped spaces that was signified by the second Moon, which was presumably summoned by the Moon Worshippers.