Army of Endless Flame

Cumulative upkeep—Create a 1/1 red Elemental creature token with haste and "Your devotion to
red is increased by one. Spells and abilities you
control can't cause you to sacrifice this creature."
Spells and abilities you control can't cause you
to sacrifice Army of Endless Flame.
At the beginning of your end step, if your
devotion to red is 25 or more, you lose the game.