Marvel: Sentient Digestive System

Japheth (Maggott)
Maggott's digestive system consisted of two enormous sentient techno-organic slug-like creatures, nicknamed Eany and Meany. Whilst Maggot himself could not eat, his slugs could devour any form of matter with incredible speed. When they finished feeding, they returned to his abdomen and imparted the energy from the matter they absorbed into Maggott's body. This energy nourished Maggott, temporarily granting him enhanced strength and turning his skin blue. If Maggott was separated from the slugs for an extended period of time, he became extremely weak and risked death.

Maggott's slugs could acto autonomously from him and appeared to be highly intelligent. They communicated with him via a telepathic rapport and were extremely sensitive to magic.