Yog-Sothoth, The All in One

Flying, Phasing, Flash
When Yog-Sothoth, The All in One is cast, you and target opponent shuffle your graveyard into your library.
Each player plays with the top card of their library revealed, opponents can't cast spells with the same converted mana costs as cards revealed.
You may play any cards revealed this way by discarding a card with converted mana cost greater than or equal to the revealed card.