Creeping Cold

A shifting cluster of ice forms in the palm of your hand. Make a melee spell attack against the target creature. On a hit, the creature is plagued with crawling ice and takes 2d10 cold damage. For the next two rounds, at the start of the creature's turn, it takes an additional 1d10 cold damage. On the third round, at the end of the creature's turn, the ice explodes and deals 1d6 damage to each creature within 5 feet of the target, including itself.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the initial damage increases by 1d10 for each slot level above 3rd.