Ali, the Reunited

+4: Double the amount of each type of mana in your mana pool. Until end of turn, you may spend mana as though it were mana of any color.
-X: Until end of turn, this card becomes an X/X legendary enchantment God creature with hexproof and indestructible that's still a planeswalker.
-X: Search your library for a God permanent card with converted mana cost X, and put it onto the battlefield. Then shuffle your library.