Antepenultimate-Ditch Effort

At the beginning of your upkeep, you lose 1 life.
At the beginning of combat on your turn, if you are at 10 or less life, target creature you control gets +X/+0 and haste, where X is 11 minus your life total.
If Antepenultimate-Ditch Effort leaves the battlefield, you lose the game.