You snap your fingers and the temperature drops below freezing in an instant.

The affected area is a 50m radius Sphere centred on you. The temperature drops so cold as to make breath turn to ice and the air fill with crystalized water. The area of the spell is Lightly Obscured. Excluding yourself, each creature within the area when the spell is cast must make a Constitution saving throw, taking 6d10 Ice damage and potentially becoming

Exhausted

Critical Success (+10). The target is unaffected.
Success. The target takes half damage.
Failure. The target takes full damage and suffers one level of Exhaustion.
Critical Failure (–10). The target takes 1.5× damage and suffers two levels of Exhaustion.

Creatures that end their turn in the spell's area must repeat the same Constitution saving throw. These Exhaustion levels persist as long as a creature is within the spell's area, and a creature recovers one level of Exhaustion granted by the spell for each turn they start outside the spell's area.