How would I rotate a part based on where the player is facing?

Could you be more specific about what you're trying to do? Where is the part? What do you mean by facing? How do you want the rotation to behave?

So when I hit a player with a rasengan (a jutsu from Naruto you can search it up if you don't know what it is) a shockwave appears where your player is standing tho I need it to face the way I hit the player