Ice Flute

Ice Flute is a Hardmode summoning item that is used to spawn Icicole, Messenger of the Ice King. It can be crafted using 5 Cryo Fragments and 20 pieces of pure ice (not purple, red or pink) at a Crystal Ball. It can be used in the Snow Biome at any time. It can still be used in any other biome, but will in most cases just make the fight ten times more difficult, because Icicole enrages when you go out of the Snow Biome. When he is defeated, the Wizard starts selling Ice Flutes on Waning and Waxing Gibbons.