I remember reading a dungeon that involved either undead or vampiric toads as the final encounter. Now I can't find it again. Does anyone know what it was?
I know it was from one of the OSR-type blogs, any it was probably written for Labyrinth Lord or Swords & Wizardry. I think it might have been in the One Page Dungeon format.
It was a fairly standard cave-system dungeon crawl, with bandits and so on, but at the far end, there were a pair of vampire toads, who lurked in a dark pool.