Winter's Clutch

Gleaming flakes of chilling snow fall in a 10-foot burst within 60 feet. Each creature in the area takes (((your level − 1) ÷ 2, rounded down) + 2)d4 cold damage with a basic Reflex save against your class DC. The ground in the area is covered in a snow drift, which is difficult terrain. Each square of the drift lasts until it melts, either naturally or until fire damage is dealt in that square.

Level (+2) The damage increases by 1d4.