Amarok

The Amarok is a Hardmode YoYo which has a chance to inflict Frostburn on affected enemies. It is dropped by enemies in the Snow Biome during hardmode with a 1 in 80 chance. The Amarok inflicts frost damage upon attack. The best Modifier is Godly.

Trivia
In Inuit mythology, Amarok are demonic wolves. They supposedly hunt alone and attack travelers wandering alone after dark.