Celestial Brand

A blazing symbol appears on the target, cursing it to face divine justice. Choose one creature that you can see within range to be marked by the celestial brand, and then designate up to three allies that you can see within range. You cannot choose yourself. Any time one of the designated allies damages the branded creature, the ally deals an additional 1d4 radiant damage.

If the target drops to 0 hit points before this spell ends, you can use a bonus action on a subsequent turn of yours to curse a new creature.
A remove curse cast on the target ends this spell early.

Using a Higher-Level Spell Slot. You can target one additional ally for each spell slot level above 1.