Korvold, Fae-Cursed King

The sacrifice-and-draw engine that finally lives on a body worth attacking with. Aristocrats had a long history of splitting its rewards across the table: an outlet on one card, a payoff on another, a card-draw hook on a third. This Dragon collapses that whole chain into a single flying threat. Every permanent you feed it is a +1/+1 counter and a card, and because the enter and attack triggers demand a sacrifice on their own, the engine primes itself the moment it lands. That is the tension the design resolves: the mandatory sacrifice is a cost most creatures would balk at, but here it is the whole point, converting spent Treasures, dying tokens, and used-up permanents directly into a swelling clock and a refilled hand. The reward trigger is the part that makes the card dangerous: it fires whenever you sacrifice a permanent for any reason at all, so a fetchland crack, a Treasure spent for mana, or an instant-speed outlet fed in response to a board wipe all cash out into counters and cards while the Dragon simply sits there collecting. The flying is what converts that accumulation into a kill: the counters pile up on an evasive attacker, so a board of expendable fodder becomes lethal damage rather than a stalled ground war. What keeps the card honest is that its own sacrifice is a triggered tithe, not a free faucet: the enter and attack triggers demand fodder that has to already be present, and once the board runs dry a greedy swing starts eating lands and pieces you wanted to keep. The engine cuts both ways, and the player, not the card, decides where the knife points.