Miirym, Sentinel Wyrm is a Dragon-tribal ramp deck. It cheats out big Dragons early with mana dorks, land auras and Dragon cost reducers, and every nontoken Dragon that enters gets a non-legendary token copy from Miirym, doubling its enter-the-battlefield effects. Those doubled triggers stack up through enters-the-battlefield damage, Treasure generation, card draw off big creatures and global attack buffs, building an overwhelming flying board that kills through combat or burn. How it wins: It floods the board with copied Dragons whose damage triggers burn opponents out and whose hasty, double-struck or power-doubled flying attacks end the game, with Niv-Mizzet plus a card-draw aura as a backup infinite-damage combo. Key roles: - Dragon ramp and cost reduction: Mana dorks, land auras and Dragon-specific discounts or restricted mana let six- and seven-drop Dragons and Miirym land turns early, and a Dragon tutor land digs for threats. (Dragonspeaker Shaman, Sarkhan, Soul Aflame, Gwenna, Eyes of Gaea) - Copy-doubled enter triggers: Miirym's tokens repeat each Dragon's enter-the-battlefield effect, so bounce, divided damage, Treasure and token makers fire twice. Flicker and clone effects re-trigger them again, and some tokens come in as extra nontoken-free bodies. (Dragonlord Atarka, Marang River Regent, Ghostly Flicker) - Dragon-count burn: Effects that deal damage whenever a Dragon enters scale with the number of Dragons, and copies both add to the count and duplicate the source. This turns each new Dragon into heavy reach, while cast triggers and damage redirection add more. (Scourge of Valkas, Dragon Tempest, Lozhan, Dragons' Legacy) - Big-creature card flow: Enchantments that draw when power-4+ or power-3+ creatures enter, or when 5+ mana value spells are cast, refill the hand from every Dragon and its token copy. (Temur Ascendancy, Garruk's Uprising, Elemental Bond) - Haste and combat multipliers: Haste lets fresh Dragons and copies swing immediately, and attack triggers grant double strike, double power or generate mana to chain more Dragons mid-combat. (Atarka, World Render, Thrakkus the Butcher, Savage Ventmaw) - Niv-Mizzet draw combo: Enchanting Niv-Mizzet with a draw-on-damage aura loops ping and draw into lethal damage, an alternate kill alongside the dragon beatdown. (Niv-Mizzet, Parun, Curiosity, Keen Sense)

Miirym, Sentinel Wyrm decklist

• Astral Dragon
• Atarka, World Render
• 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
• Wrathful Red Dragon
• Sakura-Tribe Elder
• 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
• Elemental Bond
• Up the Beanstalk
• An Offer You Can't Refuse
• Arcane Denial
• Beast Within
• Chaos Warp
• Counterspell
• Ghostly Flicker
• Pongify
• Return of the Wildspeaker
• Smuggler's Surprise
• Stubborn Denial
• Veil of Summer
• Snakeskin Veil
• 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