Concussive Burst

Power springs from your palm to deliver a burst of kinetic energy to an object or creature you try to touch.  Make a melee spell attack against the target.  On a hit, the target takes 1d12 bludgeoning damage.  This attack is treated as if it has the siege weapon quality.

The spell's damage increases by 1d12 when you reach 5th level (2d12), 11th level (3d12), and 17th level (4d12).