Niddhogr

Level 1 of the Dungeon
(0, 0, D:1)
  a scroll of enchant weapon
(12, 2, D:1)
  8 stones
(17, 3, D:1)
  a rat corpse
  a giant cockroach corpse
(17, 4, D:1)
  2 stones
(23, 8, D:1)
  3 stones