You touch a creature, transferring a virulent disease into their body. The target must make a Constitution saving throw. On a failed save, it takes 8d4 necrotic damage, or half as much damage on a successful save. The damage can’t reduce a target’s hit points below 1. If the target fails the saving throw, it can’t take reactions for the next 10 minutes as the disease clouds their brain. Any effect that removes a disease allows a creature to remove the secondary effect.