Red X

As long as this card is face up and you are alive,
your opponents cannot win the game. You win
the game when you are the only player alive.
You may flip this card face up any time as long
as you have 20 or less life or if another player
would win the game.
{x}{t} Destroy any number of creatures with total combined CMC of X or less.
{1} Sacrifice a creature you control and create X Treasure tokens, where X is that creatures CMC.