One Last Chance

Flash(This card can be played any time an instant
could be played)
You cannot lose the game. At the beginning of
each upkeep if a player took damage last turn
each players life total becomes equal to the
highest life total among players and then place
a time counter on One Last Chance.
At the beginning of your end step if One Last
Chance has more than three time counters on it
you lose the game.