Spiteful Hexmage

A 3/2 body for a single black mana normally advertises a real string attached, and here the string is a Cursed Role you must staple to one of your own creatures, shrinking it to a flat 1/1. Read cold, that looks like a tax: you buy an aggressive attacker by weakening one you already have. But the enters trigger is a targeting requirement you satisfy on your own terms, and the ideal recipient is a creature whose stats have stopped mattering. A token about to be sacrificed, a body you are content to chump with, or a creature you play for a relevant activated ability rather than its combat numbers absorbs the 1/1 shell harmlessly, and the drawback collapses into a formality. Two clauses widen the design further. The Role is a permanent that enters the battlefield, so the trigger feeds anything counting enchantments or Auras arriving on your side. And because a new Role bins any Role already attached, the shrink can be a deliberate overwrite: you swap a token's beneficial Role for the Cursed one, or reset a stacked board state, rather than eating a penalty. What sets this apart from the usual downside creature is agency over the downside. Instead of a drawback that fires on your opponent's terms or at random, it hands you a cost you get to aim, and the black decks that want it are the ones already built with somewhere to put it.