Mefis

Level 1 of the Dungeon
(0, 0, D:1)
  14 stones
(7, -4, D:1)
  a giant cockroach corpse
(16, 1, D:1)
  a +0 ring mail
(16, 6, D:1)
  a potion of degeneration
(19, -13, D:1)
  a frilled lizard corpse (skeletalised by now)