Griselbrand

Seven life for seven cards, with no upper limit on how many times you reload as long as you have the life to pay. That activated ability is the whole engine, and it reframes an eight-mana 7/7 as something almost no other fatty has been: a draw spell stapled to a body, attacking optional. In any strategy that cheats it onto the battlefield ahead of its cost, the demon does not race so much as refill your hand until it finds the kill. The lifelink is what makes the loop self-sustaining: connect once with the flier and you have banked back most of the life you are about to spend digging for your combo, so the floor on activations keeps rising rather than falling. Flying and lifelink read like flavor, the demon's bargain of power for a price, but they are load-bearing. Without lifelink the draw engine hits a hard wall around three or four activations; without flying the body cannot close on the turns you decide to attack instead of draw. Most enormous creatures cost a fortune and demand you commit them to combat to get value. This one asks the opposite: leave it back, pay the toll, and burn through a quarter of your library in a single turn. The design that makes those numbers terrifying is the same design that makes the card a reanimation target first and a beater second.