Fall of the Golden Order

When Fall of the Golden Order enters the battlefield, each opponent choses a creature of
their choice with minimum power 3 or greater.
That creature gets -12/-12 until end of turn.
While Fall of the Golden Order is on the battlefield, it cannot be the target of spells or abilities if you control a creature with subtype Tarnished.
If you control all 7 greatrunes, you win the game.