Sphere of Obliteration

Indestructible Ward {x}
At the beginning of your end phase sacrifice two permanents you control other than this card. If
you can not you lose the game. This card switches control to the person whose turn is next. This
card is not removed from play after its controller
loses the game. If this card were to be exiled,
instead remove it from the game along with all
cards in the graveyard of the player that exiled it.