Blood Burn

You curse a creature you can see, marking it with an ancient blood sigil.

• Once per turn, when you deal damage to the cursed target it takes an additional 1d6 necrotic damage.
• When the cursed creature hits you with an attack, it takes necrotic damage equal to your Charisma Modifier (minimum 1).

If the target drops to 0 hit points before the spell ends, you can use a bonus action on a later turn to transfer the curse to a new creature. Alternatively, if the target drops to 0 hit points from this spell's additional necrotic damage, you can immediately use your reaction to transfer it instead.

At Higher Levels: When cast using a 3rd-level slot or higher, the sigil's damage increases to 1d8.