Frostbyte

Location: Mount Frost
Price: N/A (Dropped by Frost Dragon (2))
Sellback: 1,000 Gold
Rarity: Rare Rarity
Base Damage: 27-33
Description: A blade that's been polar-ized in the depths of the Frozen Northlands. This is one wicked cool weapon!
Note: Also see Infernal Rocks.

Thanks to Pmk138 and Xia.