Sword Fury

You summon four astral longswords which can attack up to four targets within 30 feet. Make a ranged spell attack for each sword.  On a hit, the creature takes force damage equal to 2d10 plus your spellcasting ability modifier. As an action on later turns, you can attack with the swords.  At the end of your turn, the swords return to you.  While floating there, you can make a single attack of opportunity without using your reaction.

At Higher Levels.  When cast using a spell slot of 7th-level or higher, one additional sword is summoned per spell level above 6th.