The Lance of Eorlingas (3d8) (+13,+21)
+2 strength, dexterity, speed. Slays evil creatures, orcs, trolls. Provides resistance to fear. Cannot be harmed by acid, electricity, fire, cold. Grants the ability to see invisible things.
Min Level 20, Max Level 100, Generation chance 4, 36.0 lbs

(Angband 3.1.2v2)