The Rapier 'Forasgil' (1d6) (+12,+19)
Slays animals. Branded with frost. Provides resistance to cold, light. Cannot be harmed by acid, electricity, fire, cold.
Radius 1 light.
Min Level 1, Max Level 50, Generation chance 45, 4.0 lbs

(Angband 3.1.2v2)