Rograkh, Son of Rohgahh / Silas Renn, Seeker Adept

How it plays & wins

This is a blue-black-red turbo deck. It uses a pile of fast mana (Sol Ring, Mana Vault, Chrome Mox, Lotus Petal, Dark Ritual) to power out tutors like Demonic Tutor, Vampiric Tutor and Mystical Tutor on the first turns. Rograkh and Silas Renn give you cheap commanders to lean on while the rest of the deck sets up. Ad Nauseam and Necropotence refill your hand, and free interaction such as Force of Will, Fierce Guardianship, Pact of Negation and Daze protects the turn you go for it.

The most direct win is Thassa's Oracle with an empty library, set up through Demonic Consultation or Tainted Pact. Underworld Breach is the other route, finishing with Brain Freeze, or with Lion's Eye Diamond to fuel the Breach turn. Beyond those lines, I can't say with confidence exactly how the rest of the list assembles a win.

Analysis written with AI assistance based on this decklist.