Prerequisite: 15th level, Order of the Mutant
As a bonus action, you cause a creature within 30 feet of you to become poisoned. The cursed creature can make a Constitution saving throw at the end of each of its turns, ending the curse on itself on a success.
Amplify. The cursed creature takes 4d6 necrotic damage when you inflict this curse, and it takes this damage again each time it fails a Constitution saving throw to end the curse.