Ultimate Green Goblin

The upkeep trigger reads like a drawback until you notice what it feeds: each turn it forces a discard, then hands back a Treasure, converting cards in hand into ramp and, more importantly, into graveyard fuel. The 5/4 body wants to attack, the discard wants a stocked grip, and the Treasure wants to be spent; that friction is the engine. What closes the loop is Mayhem, which lets you recast this from the graveyard for the same turn it was discarded. The key restriction lives in the wording: it comes back only when you pitch it from hand, not when it dies on the battlefield. A removal spell that destroys it while it is in play leaves it dead. The buy-back runs entirely through a discard outlet, so pitching this on purpose (to a rummaging effect, a looting spell, a hellbent payoff) and recasting it before the turn ends becomes the whole plan, often bankrolled by the Treasures earlier upkeeps stockpiled. The Rakdos identity is doing structural work here: black's willingness to treat cards as a spendable resource married to red's disposable, one-shot mana, packaged into a threat you can keep re-deploying so long as it keeps reaching the graveyard by your own hand rather than an opponent's. The cost is genuine. You shed a card every upkeep whether you have a spare or not, and the Treasure repays a single mana at a time. It rewards a grip already committed to filling its own graveyard, not one hoping to hoard.