Flying When Sphinx of Uthuun enters, reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.
Draw a card. If a graveyard has twenty or more cards in it, draw three cards instead.
"The past is the foundation for all that exists in the present. We merely reconstruct what our ancestors have already discovered." —Sachimir, Sage of Memories
At the beginning of each player's upkeep, that player sacrifices a non-Zombie creature of their choice. At the beginning of the end step, if no creatures are on the battlefield, sacrifice Call to the Grave.