toucanbuzz
No rule is inviolate
Lol, been years. One of the best jokes, and if you look closely at the "Interior Illustrations" on the credits page, it reads:Invisible Stalker AD&D 2e Monsterous Compenium.
Let me search for the picture...
there it is...
Tim Beach and Doug Stewart (invisible stalker). Per one of the other artists, it was a prank and so good they kept it.