Threefold Reprisal

You drive a thorn through a wooden poppet as part of casting this spell, then choose one creature within range that has less than their maximum hit points to make a Wisdom saving throw. On a failure, the creature becomes Cursed (Dormant). While Cursed (Dormant), a thin branch grows out from the target bearing a single closed white flower.

The curse remains dormant until the target willingly deals damage to another creature, where the flower then opens and the curse awakens. When this happens, the target is marked by a branching pattern across its body and must make a Charisma saving throw or trigger the curse. When triggered, the target takes necrotic damage equal to half the damage it dealt and the creature it damaged regains hit points equal to the necrotic damage dealt to the target.

This curse triggers three times total before immediately ending. The poppet is a small object that can additionally be destroyed (AC 13, 10 hit points), immediately ending the curse.

At Higher Levels: When cast using a spell slot of 6th level or higher, the poppet gains 20 more hit points for every slot level above 5th.