This is a cEDH-style Esper deck that plays a Sphinx tribal value shell. The Ur-Sphinx's eminence discounts Sphinx spells from the command zone, stacking with other Sphinx and color cost reducers so the big flyers come down early. Once Sphinxes attack, the commander and attack-trigger Sphinxes turn combat into free spells, card advantage and connive, while a dense suite of fast mana, tutors, stax-lite pieces and free counterspells keeps the deck ready to assemble a compact combo. How it wins: Wins by gaining advantage with displacer kitten and getting extra turns with tivit Key roles: - Sphinx cost reduction: The Ur-Sphinx's eminence, Sphinx-specific reducers and white/blue tax effects stack so six-drop Sphinxes cost a fraction of their printed price, letting the creature plan keep pace with a fast table. (Unesh, Criosphinx Sovereign, Grand Arbiter Augustin IV, Cavern of Souls) - Attack and enter triggers: Attacking with Sphinxes mills each player for The Ur-Sphinx's free casts, reveals free spells, or connives. Sphinx entries dig through piles, and doubling creature-type triggers multiplies the payoff. (Yennett, Cryptic Sovereign, Raffine, Scheming Seer, Roaming Throne) - Blink and reanimation: Flicker and reanimation effects re-trigger Sphinx entry abilities and return milled or discarded creatures. Blinking the treasure-and-clue Sphinx refuels artifacts. (Displacer Kitten, Ephemerate, Animate Dead) - Artifact and treasure engine: Fast mana rocks, treasures from tax effects and vote-driven Treasure and Clue tokens build a large artifact count. That feeds the extra-turn artifact and lets the artifact Sphinx rebuy pieces. (Tivit, Seller of Secrets, Time Sieve, Smothering Tithe) - Combo assembly: Tutors, top-of-library manipulation and tutor-chain creatures find the instant-win pair or the turn loop. The One Ring, Displacer Kitten and Teferi, Time Raveler can also form a protective lock. (Thassa's Oracle, Demonic Consultation, Vampiric Tutor) - Interaction and taxing: Free and cheap counters, sorcery-speed or no-cast-on-your-turn effects, and draw-tax enchantments shield the combo turn while punishing opponents' plays. (Force of Will, Grand Abolisher, Rhystic Study)

The Ur-Sphinx decklist

• Grand Arbiter Augustin IV
• Tivit, Seller of Secrets
• Unesh, Criosphinx Sovereign
• Consecrated Sphinx
• Yennett, Cryptic Sovereign
• Quantum Riddler
• Displacer Kitten
• Esper Sentinel
• Grand Abolisher
• Opposition Agent
• Orcish Bowmasters
• Raffine, Scheming Seer
• Recruiter of the Guard
• Spellseeker
• Baleful Strix
• Curator of Destinies
• Sharuum the Hegemon
• Roaming Throne
• The One Ring
• Time Sieve
• Sol Ring
• Sensei's Divining Top
• Mana Vault
• Chrome Mox
• Lotus Petal
• Talisman of Dominance
• Talisman of Progress
• Fellwar Stone
• Smothering Tithe
• Rhystic Study
• Mystic Remora
• Animate Dead
• Necropotence
• Teferi, Time Raveler
• Vampiric Tutor
• Mystical Tutor
• Enlightened Tutor
• Demonic Tutor
• Imperial Seal
• Ephemerate
• Swords to Plowshares
• Dovin's Veto
• Swan Song
• Teferi's Protection
• Mana Drain
• Force of Will
• Eerie Interlude
• Silence
• Persist
• Reanimate
• Sevinne's Reclamation
• Flusterstorm
• Force of Negation
• An Offer You Can't Refuse
• Cyclonic Rift
• Ponder
• Brainstorm
• Muddle the Mixture
• Pact of Negation
• Clever Concealment
• Gemstone Caverns
• Command Tower
• Cavern of Souls
• Urza's Saga
• Watery Grave
• Hallowed Fountain
• Mana Confluence
• Exotic Orchard
• City of Brass
• Flooded Strand
• Raffine's Tower
• Otawara, Soaring City
• Marsh Flats
• Sea of Clouds
• Contaminated Landscape
• Underground River
• Floodfarm Verge
• Caves of Koilos
• Drowned Catacomb
• Isolated Chapel
• Glacial Fortress
• Deserted Beach
• Sunken Ruins
• Mystic Gate
• Fetid Heath
• Sunken Hollow
• Shadowy Backstreet
• Prairie Stream
• Soporific Springs
• Reflecting Pool
• Temple of the False God
• Fabled Passage
• Path of Ancestry
• Island
• Plains
• Swamp
• Ancient Tomb
• The Soul Stone
• The Mind Stone