Immolation Aura I believe would resonate well with the character’s power fantasy. Too spicy?
PS I think vagrancy is already demonized plenty IRL (#startrek) - While I’m calling shots let’s rename the hero to Vandal
New tier & type (so more a study piece) is activated to choose a hero & is destroyed on use, costing 400 souls. It applies a singleton curse to an enemy character, sharing minimap vision of them to your team for some minutes or until a new one is purchased & consumed