Efficiency

Level 4 of the Dungeon
[Shop] Vurpheenn's Armour Shoppe
  (Shop contents are unknown)

Level 5 of the Dungeon
(0, 0, D:5)
  a +0 mace

Level 6 of the Dungeon
(0, 0, D:6)
  9 gold pieces
(12, -6, D:6)
  a +0 short sword