This is a Temur Dragon tribal deck built around Miirym, Sentinel Wyrm, which makes a non-legendary token copy of every other nontoken Dragon that enters. Every enters-the-battlefield effect and static payoff on a Dragon happens twice, and legendary Dragons can sit beside their copies. Cost reducers, mana creatures and treasure makers rush out Miirym and a stream of big Dragons. Doubled enter triggers, burn per Dragon, draw on high-power creatures and haste then turn the board into a lethal air force quickly. How it wins: The deck builds a wide board of doubled Dragons, gives them haste and combat multipliers, and burns or attacks out the table, with the Niv-Mizzet, Parun plus Curiosity or Keen Sense loop as an extra instant kill. Key roles: - Dragon cost cheating and ramp: Cost reducers, creature-only mana and treasure makers let the deck cast six-drop Dragons on curve and chain several per turn. Treasure generation scales further when Miirym copies the treasure-making Dragons. (Dragonspeaker Shaman, Ganax, Astral Hunter, Goldspan Dragon) - Doubled enter triggers: Dragons with strong enter effects get copied by Miirym for removal, bounce, land destruction, extra tokens or counterspell value. Flicker spells reset them to trigger Miirym again. (Dragonlord Atarka, Marang River Regent, Ghostly Flicker) - Dragon-count burn: Effects that deal damage equal to the number of Dragons whenever one enters grow with every Miirym copy. Damage redirection and cast-trigger pings add more reach. (Scourge of Valkas, Dragon Tempest, Lozhan, Dragons' Legacy) - Big-body card flow: Draw engines that reward creatures with power 4 or greater, plus haste granters, refill the hand as Dragons and their copies land and let them swing immediately. (Temur Ascendancy, Garruk's Uprising, Dragonhawk, Fate's Tempest) - Combat multipliers: Double strike, doubled power, team pumps and a mass flying token engine turn the Dragon swarm into overwhelming lethal attacks. (Atarka, World Render, Thrakkus the Butcher, Lathli

Miirym, Sentinel Wyrm decklist

• Astral Dragon
• Atarka, World Render
• Magmatic Hellkite
• Dragon Broodmother
• Dragonhawk, Fate's Tempest
• Dragonlord Atarka
• Dragonlord's Servant
• Dragonspeaker Shaman
• Goldspan Dragon
• Elvish Mystic
• Ganax, Astral Hunter
• Gwenna, Eyes of Gaea
• Hellkite Courser
• Lathliss, Dragon Queen
• Llanowar Elves
• Lozhan, Dragons' Legacy
• Marang River Regent
• Niv-Mizzet, Parun
• Realmwalker
• Runescale Stormbrood
• Sarkhan, Soul Aflame
• Savage Ventmaw
• Scaled Nurturer
• Scourge of Valkas
• Smaug the Magnificent
• Somberwald Sage
• Thrakkus the Butcher
• Thunderbreak Regent
• Transcendent Dragon
• Wrathful Red Dragon
• Arcane Signet
• Cursed Mirror
• Herald's Horn
• Sol Ring
• Swiftfoot Boots
• Talisman of Creativity
• Talisman of Curiosity
• Curiosity
• Dragon Tempest
• Garruk's Uprising
• Keen Sense
• Temur Ascendancy
• Utopia Sprawl
• Wild Growth
• An Offer You Can't Refuse
• Arcane Denial
• Beast Within
• Chaos Warp
• Counterspell
• Essence Flux
• Ghostly Flicker
• Pongify
• Return of the Wildspeaker
• Smuggler's Surprise
• Spit Flame
• Stubborn Denial
• Veil of Summer
• Blasphemous Act
• Farseek
• Nature's Lore
• Rampant Growth
• Vandalblast
• Cascade Bluffs
• Cinder Glade
• Command Tower
• Dreamroot Cascade
• Exotic Orchard
• Fiery Islet
• Fire-Lit Thicket
• Flooded Grove
• Frontier Bivouac
• Frostboil Snarl
• Haven of the Spirit Dragon
• Highland Forest
• Hinterland Harbor
• Karplusan Forest
• Maelstrom of the Spirit Dragon
• Path of Ancestry
• Rimewood Falls
• Rockfall Vale
• Rootbound Crag
• Secluded Courtyard
• Shivan Reef
• Stormcarved Coast
• Sulfur Falls
• Vineglimmer Snarl
• Volatile Fjord
• Waterlogged Grove
• Yavimaya Coast
• 5× Forest
• 3× Island
• 2× Mountain