The Dagger 'Narthanc' (2d4) (+9,+12) [+10]
Branded with flames. Provides resistance to fire. Cannot be harmed by acid, electricity, fire, cold.
When aimed, it creates a fire bolt with damage 9d8. Takes 9 to 16 turns to recharge.
Min Level 1, Max Level 50, Generation chance 40, 1.2 lbs

(Angband 3.1.2v2)