Eldritch Brand

You weave eldritch power into a melee strike. As part of casting the spell, make a melee attack with a weapon you are proficient with against a creature within range. On a hit, the target takes the weapon's normal damage, and it becomes branded with eldritch energy until the start of your next turn. The first time the branded target willingly moves or makes an attack before then, it takes 1d8 scaling damage.

5th level 2d8

11th level 3d8

17th level 4d8