The rarity of Curious Coldspell is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Curious Coldspell is a skin for Puck. The skin was added to the game on November 30, 2017, it was created by LaughingSkyPig.
Curious Coldspell is currently one of the most popular skins, but it is rarely seen in the game due to its high price.