Bleed

Crackling energy coats the blade of one weapon you are carrying that deals slashing damage. On a hit, the creature must make a Constitution saving throw. On a failed save, the creature suffers a bleeding wound that deals 1d6 necrotic damage at the start of all creature's turn.

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d6 necrotic damage to the target on a hit, and the damage the target takes at the start of his turn increases to 2d6. Both damage rolls increase by 1d6 at 11th level (2d6 and 3d6) and again at 17th level (3d6 and 4d6).