Blade of Air

You shape the air into the form of an invisible sword that 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 1d8 + your spellcasting ability modifier slashing 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. If the sword is ever out of your sight for longer than it takes to blink, it disappears and the spell ends.

If the sword comes into contact with a magic item, it and the item explode and are destroyed, dealing 3d4 fire damage to everyone in a 20-foot-radius sphere, while you take 1d8 psychic damage and must make an Intelligence saving throw against your own spell save DC or fall unconscious for 1d6x10 minutes.

At higher levels. When you cast this spell with a spell slot of 2nd-level or higher, the fire and psychic damage from the explosion increase by 2d4 and 1d8, respectively, for each slot level above 1st.