Celestial's Scorn

Prerequisite: 5th level, dread star cantrip, Celestial patron
You can channel the radiance of the gods through your dread star. When you hit a creature with your dread star, you can cast fireball at 3rd level as a bonus action centered on the creature you hit without using a spell slot. When cast this way, fireball deals radiant damage rather than fire damage. You cannot use this feature again until you finish a long rest.