Corpuscle is part of a trio of bipedal interdimensional corporeal entities. They made a pact with a human named J.N. Kline in the physical plane. Through some means of telepathy, they spoke to Kline and he wrote a series of successful novels based on the entities. Like Crainiac, Corpuscle saw his inhuman creations as an art form. However, the deal was a ploy to write them into existence as immortal beings. After manifesting in the physical plane, Crainiac and the others bound Kline to his typewriter.