The Dagger 'Narthanc' (E:10, L:1) (1d4) (+4,+6)
It's the standard weapon of rogues and thieves. The blade is a foot long.
A fiery dagger finely balanced for deadly throws.
It is one of the 3 legendary daggers.
It is sentient. It can be activated for fire bolt (9d8) every 8+d8
turns if it is being worn. It provides light (radius 1) forever. It
does extra damage from fire. It provides resistance to fire. It
cannot be harmed by acid, cold, lightning or fire.
Level 4, Rarity 100, 1.2 lbs, 12000 Gold

(T.o.M.E. 2.3.5)