I do not want to place too much details and large images in spawncomics blog as it is meant to be a listing, thus the addendum.

IPISSIMUS THE SPAWN

Drawings from "Spawn/Wildcats: Devil's Day", a crossover written by Alan Moore:

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Ipissimus the Spawn - note the very contemporary drawing of the head and the amulet on his chest

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Spawn vs Ipissimus the Spawn

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Maul vs Spawn