Blades Dance

Against all odds, stand your ground and cut down any foe in your way. Choose one creature within 5 feet of you. Make a melee spell attack against the target. On hit, the target takes 8d12 damage. After the spell ends, you may teleport up to 10 feet behind the target. 

When you cast this spell using a spell slot of 4th level or higher, the damage increases by 2d12 for each slot level above 3rd.