Denis

Level 11 of the Dungeon
(4, 1, D:11)
  a stone

Level 15 of the Dungeon
(2, -2, D:15)
  a +0 scale mail
(3, 0, D:15)
  the ring of Ozaemah {Int+6 SInv Stlth+}
    [ring of intelligence]
    
    Int+6:      It affects your intelligence (+6).
    SInv:       It lets you see invisible.
    Stlth+:     It makes you more stealthy.
  (unseen)