Winter Contingency

Play this card only if your about to lose.
All of your creatures get +x/+x, trample, and vigilance.
Prevent all damage, all win conditions except by
damage are prevented for the rest of the game.
Both players life totals are set to 20.
Shuffle your graveyard into your library
and draw until there are 7 cards in your hand.
Remove all cards named Winter Contingency
from the game at the beginning of your end step.