Toxyderms

One of my favorite boss monsters is the Toxyderm found in the Urban Arcana book. for some reason, the idea of some gigantic nuclear sludge being fought by several PCs seems like such a cool fight. It isn't fun that it's so huge and utterly destructive/strong but I hope that by the time I can actually use it as a fair challenge, that will just add to the contest. One of these days, I would love to pit the players against one of these Toxyderms in a post Apocalypse setting. I would probably make them the beings found in the center of a destroyed city or something like that (ground zero from the nuclear blast) or roving across the planet and threatening the PCs after some time. Sounds like a good time to me, hopefully my Players agree that it'd be a good time...