Downburst

You gain 1d10 temporary hit points before the triggering attack deals damage. If the attack roll was a melee attack, the creature of origin must make a Strength saving throw. On a failed save, the target takes 1d10 cold damage and is knocked prone. On a successful saving throw, the target takes half damage and is not knocked prone.

At Higher Levels. For each spell slot above 1st level, the temporary hit points and the cold damage increases by 1d10.