Drawings from "Spawn/Wildcats: Devil's Day", a crossover written by Alan Moore:
Ipissimus the Spawn - note the very contemporary drawing of the head and the amulet on his chest
Spawn vs Ipissimus the Spawn
Maul vs Spawn
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.