Bob's Dumb Dagger

You create a dagger-shaped plane of force that hovers within range. It lasts for the duration.

When the dagger appears, you make a melee spell attack against a target of your choice within 5 feet of the sword. On a hit, the target takes 1d4 force damage. Until the spell ends, you cannot speak coherent sentences but can still perform the verbal components of spells. Additionally, and can use a bonus action on each of your turns to move the dagger up to 20 feet to a spot you can see and repeat this attack against the same target or a different one. This spell’s damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).