Blackfrost is a series of alternate future/universe skins in League of Legends. Set in universe with an alternate depiction of Freljord, characters are corrupted by the powers of Lissandra the Ice Witch.

The Ice Witch lets none slumber; each fallen friend and foe in her domain rises anew to fight by her side. Her dark magic twists their appearance, creating glacial golems with hearts of black, unmelting ice.