Concussive Grasp

Grasping and enemies head, you send out a seismic pulse, damaging their brain directly. Make a melee spell attack against the target. You have advantage on the attack roll if the target isn't wearing a helmet. On a hit, the target takes 1d10 psychic damage, and it can't make reactions until the start of its next turn.

The spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).