Jodah, the Unifier [Dominaria United]

Set: Dominaria United Type: Legendary Creature — Human Wizard Rarity: Mythic Cost: {W}{U}{B}{R}{G} Legendary creatures you control get +X/+X where X is the number of legendary creatures you control.Whenever you cast a legendary spell from your hand, exile cards from the top of your library until you exile a legendary nonland card with lesser mana value. You may cast that card without paying its mana cost. Put the rest on the bottom of your library in a random order.