Oath of Zarek

Flash
When Oath of Zarek enters the battlefield, copy target instant or sorcery spell. You may choose new targets for the copy.
Exile three planeswalkers you control: Take an extra turn after this one. Activate this ability only any time you could cast a sorcery.
Exile a planeswalker you control: Take an extra turn after this one. During that turn's end step, you loose the game. Activate this ability only any time you could cast a sorcery.