Miguel, The G.O.A.T

Last Stand (If this creature is on the battlefield, all creature you control gain +0/+X
where X is the number of creature you control)

{u}{r}{b}- Pay 10 lives and sacrifice this creature. At the start of your upkeep, if you have less than 5 Life and there is at least 1 creature on the battlefield under your control. You win the game.
You can only activate this ability as sorcery.