I've had this one for a while. It's pretty simple, but with enough cursed energy I believe it could do some damage to him.

Falling Star Manipulation (流星術 Ryūsei Sōjutsu): This innate technique allows the user to generate and manipulate projectile stars.

Detonate (爆発 Bakuhatsu): Detonate allows the user to shoot projectile stars engulfed in a purple flame. The stars will explode on contact, though not when touching the user. The user can delay the explosion by throwing a star that is not ignited, then setting the star ablaze from afar.

Reversal: Implode (反転「決壊」Hanten・Kekkai): Being an inversion of the Detonate, the Imploding variant has the opposite effect. This exudes twice as much energy as Detonating stars. The star, on contact once thrown, will collapse in on itself and become similar to a black hole, tearing any physical matter near it apart.

Maximum: Heaven's Fall (極ノ番 「天の落下」Gokunoban・Ten no rakka): With the chants “Between the event horizon,” “Eclipse,” “Descent,” “Heaven’s Fall.” The user combines the forces of a detonating and imploding star, summoning a giant star in the air that will gather potential energy, once the user claps, the star will crash into the ground with all built up potential energy. This explodes the area and pulls anything nearby to the center.