Blazing Hammer

You launch a ball of compressed heat at a target within range.  Make a ranged spell attack against the target.  On a hit the target takes 1d4 fire damage and 1d4 bludgeoning damage from the impact.  On a critical hit an enemy of Large or smaller size is knocked prone.

At Higher Levels:  This spell increases by one die when you reach 5th level (2d4/2d4), 11th level (3d4/3d4), and 17th level (4d4/4d4).