As a Bonus Action, you can emblazon a mark of condemnation upon a creature you can see within 60 feet of you. The target must succeed on a Wisdom saving throw against your spell save DC or be marked for 1 minute. While marked, the target takes 6d6 Radiant damage at the start of each of its turns, can't regain Hit Points, and can't have Advantage on D20 Tests. A marked target can repeat its saving throw at the end of each of its turns, ending the effect on itself on a success.
Once you mark a creature using this feature, you can't use it again until you finish a Long Rest. You can also restore your use of it by expending a use of your ValdaSpire24 (no action required).