Rend Flesh

necromancy cantrip (hemomancy)
Casting Time: 1 action
Range: 60 feet
Components: S
Duration: Instantaneous

You manipulate the blood beneath the skin of a creature you can see within range. The target must succeed on a Constitution saving throw, or become poisoned until the start of its next turn. While poisoned this way, weapon attacks deal an extra 1d4 necrotic damage to the target.

At Higher Levels. The extra damage the target takes by weapon attacks increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).