The Kingsguard

When the only other players are The King , their teammates and your teammates, reveal The Kingsguard and you all win the game. When there is no King you lose the game.

If The King has 20 or less life you gain "If damage would be dealt to The King , you may reveal The Kingsguard and prevent all damage dealt to The King this turn."

If The Kingsguard is face up, during each upkeep create a white 1/1 Bodyguard token with Defender and Vigilance under The Kings control.