Peace Treaty

When Peace Treaty enters the battlefield, target an opponent.
You and target opponent are allies (Neither player can attack each other or planeswalkers they control, target each other or creatures/ planeswalkers they control with instants, sorceries, or abilities ("All" or "each" are included, so they are protected). Allied players can tap lands or creatures for mana to pay for the other's spells. Ect, ect. Other stuff that harms them or their board state)