This is a Temur Dragon tribal deck built around Miirym, Sentinel Wyrm. Each nontoken Dragon that enters while Miirym is out also creates a non-legendary token copy, so every enters trigger, damage burst and value effect happens twice. Cost reducers, mana dorks and Dragon-only lands speed out a stream of big flyers. The doubled Dragons then feed enters-damage engines, card draw for power 4 or greater creatures, and attack-trigger payoffs that turn a flying board into lethal damage. How it wins: It swarms the board with doubled Dragons and wins through flying, trampling combat boosted by double strike and power doubling, backed by repeated enters-damage triggers, with a Niv-Mizzet, Parun plus Curiosity or Keen Sense loop as an alternate instant kill. Key roles: - Dragon acceleration: Mana dorks, land ramp and Dragon-specific cost reducers and lands get Miirym and six-drop Dragons down early, then let several Dragons resolve in one turn so the copies stack up (Dragonspeaker Shaman, Sarkhan, Soul Aflame, Gwenna, Eyes of Gaea). - Doubled enters-the-battlefield value: Dragons with strong enters triggers make bounce, damage, counterspell-plus-free-cast, or extra 5/5 tokens happen twice when Miirym copies them, and flicker spells let them re-enter for more triggers (Dragonlord Atarka, Lathliss, Dragon Queen, Ghostly Flicker). - Dragon-enters burn: Each Dragon or token entering deals damage scaling with the number of Dragons controlled, and some recast triggers add more burn. This turns board growth into direct reach against creatures and players (Scourge of Valkas, Dragon Tempest, Lozhan, Dragons' Legacy). - Big-creature card flow: Because nearly every threat has power 4 or greater, haste and draw-on-entry enchantments refuel the hand and let fresh copies attack at once, while top-of-library casting keeps Dragons coming (Temur Ascendancy, Garruk's Uprising, Realmwalker). - Combat amplifiers: Attack triggers grant double strike, double Dragon power, produce treasure or mana, and dig extra cards, so one big swing can be lethal across the table (Atarka, World Render, Thrakkus the Butcher, Savage Ventmaw). - Niv-Mizzet draw loop: An aura that draws whenever the enchanted creature damages an opponent, placed on Niv-Mizzet, Parun, turns each draw into a ping that draws again. This gives an infinite damage finish outside combat (Niv-Mizzet, Parun, Curiosity, Keen Sense).

Miirym, Sentinel Wyrm NEU 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