Warlock
Story: Warlock with a pact with a Deity to kill the paladins who break the oath with them
Functionality: Gives disadvantage to hit when the opponent uses an attack dealing radiant damage, additional bonuses to hit are not counted if the opponent is a paladin of the Deity
Inspiration: I don't know but I told this Idea to my older cousin and he said "cool" so I'm feeling POWERFUL