Crimson Plague

The target must roll a Constitution saving throw of 15 or higher. If they succeed, they take only half the damage of a 3d10. if they fail, they get hit with 3d10 Poison damage and every time it's their turn, take 1d8 Poison damage until the 2 Minutes are up. This effect does not work if the target has a class or racial trait that makes them immune to disease, i, e, Purity of Body, etc.