Hero's Defiance

Hero's Defiance enters the battlefield with two
time counters on it.
Vanishing (At the beginning of your upkeep,
remove a time counter from this enchantment.
When the last is removed, sacrifice it.)
As long as you control a creature you can't lose
the game and your opponents can't win the game. Damage that would reduce your life total to less
than 1 reduces it to 1 instead.