Desperate Armistice

When Desperate Armistice enters the battlefield, choose a player. Creatures the chosen player controls can't attack you or planeswalkers you control.
Whenever one or more creatures you control attack, sacrifice Desperate Armistice.
Fateful hour — As long as you have 5 or less life, you may pay {2}{w} rather than pay Desperate Armistice's mana cost.