The Long Sword 'Elvagil' (2d5) (+12,+12)
+2 dexterity, charisma, stealth. Slays orcs, trolls. Cannot be harmed by acid, electricity, fire, cold. Feather Falling. Grants the ability to see invisible things.
Min Level 1, Max Level 50, Generation chance 75, 13.0 lbs

(Angband 3.1.2v2)