Thog the Nether-Spawn, Overmaster of Sominus is a fictional character appearing in the Marvel Comics universe. He is a emon from the extra-dimensional world of Sominus who has clashed with the Man-Thing. He first appeared in Adventure into Fear #11, Steve Gerber's first work for Marvel, illustrated by Val Mayerik. Gerber himself, along with Man-Thing, were integral in defeating Thog on Therea in his first attempt to take over the universe. Chris Claremont, in the form of Man-Thing, defeated him in his second.