Patchwork Beastie

A 3/3 for a single green mana is a rate green has spent its whole history refusing to offer, and this card pays for it not with a downside on the body but with a gate on when the body is allowed to fight. Delirium here is a lock, not a bonus: until the graveyard holds four or more card types, the creature is a wall that can't block and a beater that can't swing, a green Ball Lightning frozen mid-lunge. The optional upkeep mill is the card feeding its own condition, one card at a time toward the diversity it needs, which turns the deckbuilding question into a graveyard problem rather than a curve problem. You want lands, instants, sorceries, artifacts, enchantments dropping into the yard on their own schedule, and the beast rewards a shell already invested in filling the graveyard for other reasons. That coupling is the whole design: an aggressive body held hostage by a delirium count, with a built-in engine that slowly pays the ransom. Left alone in an unfurnished graveyard it does nothing but mill one card a turn while it stands there inert; drop it into a deck that mills, cracks fetches, and cycles freely and the gate opens by the time it matters. It is delirium used as a genuine cost rather than a rider, which is rarer than the keyword's usual appearances suggest.