Ava's Glacial Deposition

Water vapor instantly freeze the ground in a 20-foot-radius centered on a point within range. Each creature in the radius must make a Constitution saving throw. A creature takes 5d6 cold damage on a failed save, or half as much damage on a successful one.

The ice turns the area into difficult terrain until the end of your next turn.If the point is under water, the water freezes remaining until melted and any creature in the radius must make a Strength saving throw or be restrained and begins to suffocating. A creature that failed its saving throw can repeat the save at the end of each of its turns to break free.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.