The Ur-Sphinx [Reality Fracture Commander]

Set: Reality Fracture Commander Type: Legendary Creature — Sphinx Avatar Rarity: Rare Cost: {6}{W}{U}{B} Eminence — As long as The Ur-Sphinx is in the command zone or on the battlefield, other Sphinx spells you cast cost {1} less to cast. Flying Whenever one or more Sphinxes you control attack, each player mills that many cards. For each player, you may cast a card that player milled this way without paying its mana cost.