Captain of the Guard

Reveal Captain of the Guard if the only other
players remaining are the King and his teammates.
You all win the game.
You lose the game if there is no King.
If the King is being attacked by creatures with
total power 10 or more by another player, or if an unblocked attacking creature would cause the
King to lose the game, you may reveal the
Captain of the Guard. If you do, prevent all
combat damage that would be dealt this turn.