You create a floating, flaming blade that lasts for the duration. The blade appears within range in a space of your choice, and you can immediately make one melee spell attack against one creature within 5 feet of the blade. On a hit, the target takes Force damage equal to 3d6 plus your spellcasting ability modifier plus your proficiency modifier.

As a Bonus Action on your later turns, you can move the force up to 20 feet and repeat the attack against a creature within 5 feet of it.