QED

the Dungeon
(0, 0, D)
  a bat corpse
(0, 1, D)
  a +0 club
  a +0 whip
  a stone
  a kobold corpse
(0, 3, D)
  a stone
(0, 5, D)
  a scroll of blinking
  a potion of berserk rage
  a potion of haste