SphinxHow it works & interactions with other cards

Flying Sphinx spells you cast cost {2} less to cast. Whenever Unesh or another Sphinx you control enters, reveal the top four cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

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.

Draw two cards. Then you may exile this spell and four cards named Sphinx's Approach from your graveyard. If you do, search your library for a Sphinx creature card, put it onto the battlefield, then shuffle. A deck can have any number of cards named Sphinx's Approach.

Sphinx of the Guildpact is all colors. Flying Hexproof from monocolored (This creature can't be the target of monocolored spells or abilities your opponents control.)

Put target attacking or blocking creature on top of its owner's library. Create a 4/4 white and blue Sphinx creature token with flying and vigilance.

Strive — This spell costs {1}{U} more to cast for each target beyond the first. Exile any number of target creatures. For each creature exiled this way, its controller creates a 4/4 blue Sphinx creature token with flying.

Whenever you cast a noncreature spell, you may have this enchantment become a 3/3 Sphinx creature with flying in addition to its other types until end of turn. {2}{U}: Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

{2}{U}, {T}, Sacrifice a white creature, a blue creature, and a black creature: Search your library for a card named Sphinx Sovereign, put it onto the battlefield, then shuffle.