A blue-white ray of freezing air and ice springs from your hand toward a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 12d6 cold damage and must succeed on a Constitution saving throw or be frozen solid until the start of your next turn. A creature who is frozen solid by this spell counts as petrified; however, instead of receiving resistance to bludgeoning and fire damage, the target has vulnerability to those damage types. In addition, when the effect wears off, the target suffers one level of exhaustion.

At higher levels: When you cast this spell using a spell slot of 9th level the effect lasts for 1 minute (requiring concentration to maintain). A creature affected by winter cannon can make a new Constitution saving throw at the end of each of its turns, ending this effect on a success. On a failed save, the target suffers another level of exhaustion.