Blood Purge

Necromancy Cantrip (Hemomancy)
Casting Time: 1 action
Range: Touch
Components: V, M (a knife or dagger)
Duration: 1 minute

You purge impurities from the blood of a willing creature you touch. The target takes 1d4 piercing damage and has advantage on the next saving throw it makes against disease or against being poisoned before the spell ends. If the target is already suffering from a disease or poison that allows for repeated saving throws to remove the effect, it can immediately make a new saving throw against the effect with advantage. Regardless if this new save succeeds or fails, a target that is already suffering from a disease or the poisoned condition can’t be affected by this spell again until it finishes a long rest.

At higher levels. As you increase in levels, the use of this cantrip expands. At 5th level, the conditions that can be cured expands to non curse conditions, At 11th level a creature can't be affected again until it completes a short or long rest and at 17th level, the creature can be affected again, but they the piercing damage is increased by 1d4 for each subsequent cast they have experienced before a short or long rest.