Blood Corruption

You corrupt the blood of a creature of your choice that you can see within range, turning its body against itself. The target must make a Constitution saving throw. The target takes 3d12 poison damage on a failed save, or half as much damage on a successful one. This spell has no effect if the creature has no blood.

On a fail, the creature is also magically poisoned for 7 days. While it is poisoned, it cannot be healed by any means, magical or otherwise.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d12 for each slot level above 2nd.