Death's Mark

As a bonus action, you mark one creature within 30 ft for death. The creature must make a constitution saving throw (DC equal to your spell save DC) or become marked. On a successful save, the spell has no affect. While a creature is marked, all attacks against that creature have an increased damage equal to your spell attack modifier. When the creature drops to 0 hitpoints it gets an automatic failed death saving throw and the spell continues to have an effect. If the creature dies, you can pick another creature within 30 ft of the dead creature to curse again without using a spell slot. Additionally, you gain temporary hit points equal to how much damage you delt to that creature. If the spell duration ends, you don't gain the benefits of the spell thereafter and cannot transfer the curse to another creature without using a spell slot. Additionally, when you curse a new creature, the timer resets. This spell can be removed using the Remove Curse spell or Lesser Restoration.