Jace, Multiverse Architect is a four-color control superfriends-style commander: it taxes attacks, tops up the hand with its +1, and its −3 turns any creature or planeswalker into a random cheat into play. The deck locks down combat with attack-tax enchantments, holds up a deep counterspell and removal suite, and stays ahead on cards while ramping on mana rocks. Then it cashes in a small pool of huge creatures, either cast outright or pulled from the library by Jace's −3, Proteus Staff and mass-polymorph effects that turn cheap tokens into giants. With almost every creature in the list a big finisher, these reveal-until effects nearly always hit a game-winning threat. How it wins: It neutralizes opponents behind taxes, counters and wipes until a polymorphed or hard-cast flier like Archon of Cruelty, Archfiend of Despair, Absolute Virtue or Hullbreaker Horror takes over and attacks the table down. Key roles: - Attack taxes: Stack payment requirements on attacking the player and Jace so the commander survives and opponents waste mana; these stack with the commander's own {2} tax and the enchantment-scaled tax (Propaganda, Ghostly Prison, Sphere of Safety) - Polymorph cheats: Exile or bottom a cheap creature or token to reveal into the deck's few massive creatures, often several at once from a board of tokens (Mass Polymorph, Synthetic Destiny, Proteus Staff) - Token fodder: Cheap token makers supply bodies for the polymorph effects, chump blockers, and story counters that turn into card draw (Secure the Wastes, Lingering Souls, Staff of the Storyteller) - Big-threat package: A handful of expensive fliers and value creatures serve as the reveal targets and the actual finishers, with recursion and protection built in (Archon of Cruelty, Hullbreaker Horror, Avacyn, Angel of Horror) - Counter wall: A dense set of cheap and flexible counterspells protects the lock and the key turns, which makes spell-cast triggers easy to trip at instant speed (Counterspell, Disallow, Render Silent) - Spell value and sweepers: Noncreature spells refill the hand through cast triggers while wipes reset boards, some of them leaving tokens to polymorph afterward (Whirlwind of Thought, Shark Typhoon, Martial Coup)

Polymorph decklist

• Brainsurge
• Propaganda
• Rakdos Signet
• Sphere of Safety
• Ghostly Prison
• Sol Ring
• Arcane Signet
• Talisman of Progress
• Fellwar Stone
• Azorius Signet
• Talisman of Dominance
• Chromatic Lantern
• Izzet Signet
• Dimir Signet
• Talisman of Creativity
• Dig Through Time
• Ponder
• Brainstorm
• Whirlwind of Thought
• Fact or Fiction
• Swords to Plowshares
• Stroke of Midnight
• Path to Exile
• Expressive Iteration
• Despark
• Martial Coup
• Sunfall
• Counterspell
• White Sun's Twilight
• Swan Song
• Dovin's Veto
• Negate
• Disallow
• Render Silent
• Spell Pierce
• Dreadhorde Invasion
• Skrelv's Hive
• Secure the Wastes
• Shark Typhoon
• Elspeth, Sun's Champion
• Staff of the Storyteller
• Windcrag Siege
• Lingering Souls
• Currency Converter
• Farewell
• Restless Spire
• Restless Anchorage
• Kher Keep
• Avacyn, Angel of Horror
• Nezahal, Primal Tide
• Serra's Emissary
• Archon of Cruelty
• Archfiend of Despair
• Absolute Virtue
• Nissa, Leyline Tamer
• Glacial Fortress
• Turbulent Wetlands
• Exotic Orchard
• Sunken Ruins
• Mass Polymorph
• Command Tower
• Mystic Gate
• Proteus Staff
• Turbulent Shore
• Stingerquill Annex
• Fetid Heath
• Synthetic Destiny
• Prairie Stream
• Fatehold Annex
• Path of Ancestry
• Battlefield Forge
• Reflecting Pool
• Drowned Catacomb
• Isolated Chapel
• Underground River
• Turbulent Crater
• Caves of Koilos
• Contaminated Landscape
• Sulfurous Springs
• Clifftop Retreat
• 2× Mountain
• Perilous Landscape
• Fabled Passage
• Sulfur Falls
• Shivan Reef
• Radiant Summit
• 2× Plains
• 3× Island
• 2× Swamp
• Flawless Maneuver
• Grand Crescendo
• Talisman of Indulgence
• Occult Epiphany
• Hullbreaker Horror