This is a fast four-color Thrasios and Vial Smasher deck. It ramps early on mana dorks and cheap rocks, protects itself with free and cheap counterspells and interaction, and draws heavily from Rhystic Study, Mystic Remora and Thrasios activations. It wins by assembling an infinite mana loop that turns Thrasios into a draw-the-deck engine. Along the way, Vial Smasher punishes opponents whenever the first spell each turn is a big one: delve spells and extra-turn sorceries with high mana value hit hard while costing far less to cast. How it wins: It goes infinite with Devoted Druid, Palinchron or Hullbreaker Horror loops, sinks the mana into Thrasios to draw its library, then chains extra turns, a mass bounce or repeated casts to finish opponents. Key roles: - Infinite mana engines: Devoted Druid's untap ability becomes unlimited once its ability is copied onto a non-creature Food with Hazel's Brewmaster, or once a creature cost reducer lowers the untap. Palinchron untapping lands while copies or bounce effects recycle it, and Hullbreaker Horror bouncing a cheap mana rock on every cast, give separate infinite loops (Devoted Druid, Hazel's Brewmaster, Hullbreaker Horror). - Creature tutors and copies: Convoke, sacrifice and harmonize tutors fetch combo creatures straight onto the battlefield. Clone effects duplicate whichever engine piece is already out, giving many routes to the same loop (Chord of Calling, Eldritch Evolution, Phantasmal Image). - Activation cost reducers: These cheapen creature activated abilities. That fuels the Druid combos and makes Thrasios's repeatable draw-or-ramp ability far more efficient, so excess mana converts into cards (Training Grounds, Biomancer's Familiar, Heartstone). - Vial Smasher damage-draw package: Vial Smasher itself deals its trigger damage, so card-draw auras and soulbond on Vial Smasher turn each first-spell burn into an extra card. This rewards leading each turn with a high mana value spell (Curiosity, Tandem Lookout, Snake Umbra). - Delve and big-spell payoffs: Cheap ramp and surveil lands fill the graveyard. That lets huge mana value spells come down cheaply as both card advantage and large Vial Smasher hits, including the extra-turn finishers (Temporal Trespass, Dig Through Time, Murktide Regent). - Cheap interaction and stax-light pressure: Low-cost counters, flash enablers and removal protect combo turns. Opponent-tax draw enchantments and Mind's Dilation punish their spells (Flusterstorm, Mystic Remora, Mind's Dilation).

B3 Thrass/Vial decklist

• Island
• Forest
• Swamp
• Arcane Signet
• Command Tower
• Swan Song
• Birds of Paradise
• Bloom Tender
• Counterspell
• Curiosity
• Eldritch Evolution
• Elves of Deep Shadow
• Eternal Witness
• Expropriate
• Farseek
• Go for the Throat
• Llanowar Elves
• Nature's Lore
• Rhystic Study
• Snake Umbra
• Sol Ring
• Tandem Lookout
• Treasure Cruise
• Fellwar Stone
• Veil of Summer
• Blasphemous Act
• Exotic Orchard
• Seedborn Muse
• City of Brass
• Bloodstained Mire
• Flooded Strand
• Fyndhorn Elves
• Mystic Remora
• Training Grounds
• Breeding Pool
• Watery Grave
• Elvish Mystic
• Toxic Deluge
• Deathrite Shaman
• Mind's Dilation
• Biomancer's Familiar
• Dig Through Time
• Devoted Druid
• Abrupt Decay
• Assassin's Trophy
• Cyclonic Rift
• Marsh Flats
• Misty Rainforest
• Phantasmal Image
• Scalding Tarn
• Verdant Catacombs
• Mana Confluence
• Polluted Delta
• Windswept Heath
• Wooded Foothills
• Chord of Calling
• Flusterstorm
• Time Stretch
• Palinchron
• Emergence Zone
• Deadly Rollick
• Ethereal Forager
• Temporal Trespass
• Three Visits
• Ketria Triome
• Zagoth Triome
• Heartstone
• Chain of Vapor
• Ophidian Eye
• Dead Drop
• Murderous Cut
• Mindbreak Trap
• Keen Sense
• Culling Ritual
• Ignoble Hierarch
• Murktide Regent
• Hullbreaker Horror
• Boseiju, Who Endures
• Otawara, Soaring City
• Ziatora's Proving Ground
• Xander's Lounge
• An Offer You Can't Refuse
• Machine God's Effigy
• Faerie Mastermind
• Borne Upon a Wind
• Commercial District
• Hedge Maze
• Raucous Theater
• Thundering Falls
• Undercity Sewers
• Underground Mortuary
• Mockingbird
• Hazel's Brewmaster
• Nature's Rhythm
• Turbulent Fen
• Turbulent Springs
• Turbulent Wilderness
• Turbulent Crater
• Turbulent Wetlands