You bring the unforgiving cold of the Nine Hells to your enemies. All creatures in a 20 ft radius from a point you choose must make a Constitution saving throw. On a failed save, they take 15d8 restrained as they begin to freeze. On a successful save, the creatures take half damage and do not begin to freeze

A creature restrained by this spell must make another Constitution saving throw at the end of each of its turns. If it successfully saves against this spell three times, the spell ends. If it fails its saves three times, it is turned to ice and subjected to the petrified condition for the duration. The successes and failures don't need to be consecutive; keep track of both until the target collects three of a kind.

If the creature is physically broken while petrified, it suffers from similar deformities if it reverts to its original state.

If you maintain your concentration on this spell for the entire possible duration, the creature is turned to ice until the effect is removed.