Death Spores

Death sneaks it's way into the blood of your prey, waiting to be pulled out of them by force. The target must make a Constitution saving throw. On a failed save, the target takes damage from your circle of spores class ability and an additional 2d6 poison damage for every point of Decay the target is currently suffering from.

Alternatively you may choose for the target to take only the damage from your circle of spores class ability but also gain one level of Decay.