How about punching some ghosts?
Fist for Force
Casting Time:1 action
You focus your energy into your fist and unleash the full furry of your power into the target. Make a melee spell attack against the target. On a hit, the target takes 1d12 force damage.
This spell’s damage increases by 1d12 when you reach 5th level (2d12), 11th level (3d12), and 17th level (4d12).