Alpha's Comet

You bring forth a wave of airlese, supernaturally-intense cold in a 60-foot cone. Each creature in that area must make a Constitution saving throw or take 7d6 cold damage on a failed saving throw, or half as much on a successful one. In addition, if a creature fails its saving throw by 5 or more, it takes a level of exhaustion as the air is ripped from its lungs.

All normal Vegetation of Medium size or smaller in the area dies, and larger Veqetation has a 50 percent chance of dying. Plant creatures arc no more susceptible than other living beings are. Normal fires in the area are immediately snuffed and standing water instantly freezes.