Bleeding Touch

You cause a bleeding wound to appear on one living creature you touch. That creature must make a Constitution saving throw. On a failure, it takes an amount of necrotic damage equal to your spellcasting ability at the end of each of its turns for the next three rounds.

You inflict an additional +2 damage at 5th level, +4 damage at 11th level, and +8 damage at 17th level.