Cryo Burst

Every creature in a 30 ft cone makes a CON save. On a failed save take 3d8 cold damage and are hindered by ice formations reducing their speed to 0 until their next turn OR a creature uses an action to break the ice. On a success take half damage.

Until the start of your next turn the ground within the cone becomes difficult terrain and the wielder gains resistance to cold damage.

Each level above 2nd increases the damage by 1d8.