Mage Chair

You magically conjure a spectral chair next to you. The chair is capable being used as a seat. 

Additionally,  as an action you can make a melee spell attack with the chair. You are proficient in attacking with the chair. On a hit the target takes 1d4 Force damage. 

The spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).