Exoskeletal Armor

Most pump auras price the bonus into the cost: +2/+2 here, +3/+3 there, a fixed number you pay for up front. This one outsources the math to the board state, scaling off every creature card sitting in every graveyard. In an empty-graveyard game it does nothing worth the card, but the longer a game grinds and the more creatures trade, the larger the swing becomes, which makes it a payoff for attrition rather than a cost you front-load. The catch is the aura's eternal liability: it is a two-card investment on a single body, and the bonus is read at all times, so an instant-speed graveyard answer to remove a few key creatures can shrink the buff at the worst possible moment, and a removal spell on the host costs you both cards at once. It belongs to the broad green tradition of graveyard-as-resource design that runs through cards like Squee, Goblin Nabob and the whole madness-and-recursion architecture of its era, but instead of recurring threats from the yard it weaponizes the yard's mere size. The reward is genuine and can be game-ending; the structure of an aura that only pays off late, and pays off bigger the deeper the graveyard, is the wager you accept in exchange for a beater that scales with the wreckage of the game itself.