Daybreak

Throw out an arching flame out of your sword. This arching flame uses your spell attack bonus, has a range of 60ft, and deals 3d6 fire damage. When you kill a creature with Daybreak, the sword regains a charge. At the start of each of its turns until the spell ends, the target must make a Constitution saving throw. On a failed save, it takes 1d6 fire damage. On a successful save, the spell ends. If the target or a creature within 5 feet of it uses an action to put out the flames, or if some other effect douses the flames (such as the target being submerged in water), the spell ends.