H2SO4

Level 1 of the Dungeon
(9, 20, D:1)
  a rat corpse
(14, 8, D:1)
  a hobgoblin skeleton
(23, -5, D:1)
  a hobgoblin corpse (skeletalised by now)
(27, -4, D:1)
  a rat corpse (skeletalised by now)
(30, 18, D:1)
  a goblin corpse