Arcane Sword

You create a sword-shaped plane of force that hovers within range. It lasts for the duration. When the sword 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 3d10 force damage. Until the spell ends, you can use a bonus action on each of your turns to move the sword up to 20 feet to a spot you can see and repeat this attack against the same target or a different one.

You create a spectral sword that hovers within range. It lasts for the duration. When the sword appears, you make a melee spell attack against a target within 5 feet of the sword. On a hit, the target takes Force damage equal to 4d12 plus your spellcasting ability modifier. On your later turns, you can take a Bonus Action to move the sword up to 30 feet to a spot you can see and repeat the attack against the same target or a different one.