The Beaked Axe of Theoden (2d6) (+8,+10)
+3 wisdom, constitution. Slays dragons. Cannot be harmed by acid, electricity, fire, cold. Slows your metabolism. Grants telepathy.
When aimed, it drains up to 120 hit points of life from a target creature. Takes 40 turns to recharge.
Min Level 20, Max Level 100, Generation chance 7, 18.0 lbs

(Angband 3.1.2v2)