Miirym copies every nontoken Dragon that enters, so this Temur Dragon tribal deck ramps hard with Dragon-specific mana and cost reducers, then deploys big Dragons that each arrive twice, doubling their enter-the-battlefield value and their attack triggers. Because the token copies are non-legendary, the many legendary Dragons stay as two copies of each. Damage engines that fire per Dragon entering, and card draw that rewards big creatures entering, turn every cast into removal and refuel. Panharmonicon and flicker effects multiply the copy trigger further. How it wins: It builds an overwhelming flying Dragon board, doubled by Miirym, then finishes with burn triggers from Dragons entering and huge hasty attacks powered by extra combats, double strike and power doubling. Key roles: - Dragon ramp and cost reduction: Dragon-only mana rocks, mana creatures and discounters, along with land ramp, let multiple big Dragons land per turn and fuel a free-cast finish (Dragonspeaker Shaman, Orb of Dragonkind, Dracogenesis) - Copy and trigger multiplication: Miirym's token copies are amplified by doubled ETB triggers, flickers that re-enter Dragons as new nontoken permanents, and spell or creature copying that yields more Dragons (Panharmonicon, Ghostly Flicker, Reflections of Littjara) - Dragon-enters damage engines: each Dragon entering, and its Miirym copy, deals damage scaling with Dragon count or power, clearing blockers and burning players out (Terror of the Peaks, Scourge of Valkas, Dragon Tempest) - Value on entry: Dragons and enchantments that make Treasure, draw cards, or put more Dragons onto the battlefield when big creatures enter, all doubled by copies (Ganax, Astral Hunter, Ureni of the Unwritten, Temur Ascendancy) - Combat finishers: haste, double strike, power doubling and extra combat phases turn the doubled Dragon board into lethal swings (Atarka, World Render, Thrakkus the Butcher, Scourge of the Throne) - Dragon tutors and access: tutors and top-of-library casting keep a steady stream of Dragons coming for Miirym to copy (Sarkhan's Triumph, Korlessa, Scale Singer, Draconic Muralists)

Miirym, Sentinel Wyrm decklist

• Arcane Signet
• Carnelian Orb of Dragonkind
• Dragon's Hoard
• Dragonstorm Globe
• Jade Orb of Dragonkind
• Mox Jasper
• Orb of Dragonkind
• Panharmonicon
• Sol Ring
• Cinder Glade
• Command Tower
• Evolving Wilds
• Exotic Orchard
• 6× Forest
• Frontier Bivouac
• Haven of the Spirit Dragon
• Hinterland Harbor
• 5× Island
• Karplusan Forest
• Maelstrom of the Spirit Dragon
• Mosswort Bridge
• 7× Mountain
• Path of Ancestry
• Rockfall Vale
• Rootbound Crag
• Shivan Reef
• Sulfur Falls
• Temple of Abandon
• Temple of the Dragon Queen
• Yavimaya Coast
• Astral Dragon
• Atarka, World Render
• Bloomvine Regent // Claim Territory
• Deceptive Frostkite
• Draconic Muralists
• Dragonlord's Servant
• Dragonmaster Outcast
• Dragonspeaker Shaman
• Drakuseth, Maw of Flames
• Earthquake Dragon
• Ganax, Astral Hunter
• Hellkite Charger
• Iymrith, Desert Doom
• Klauth, Unrivaled Ancient
• Korlessa, Scale Singer
• Lathliss, Dragon Queen
• Lozhan, Dragons' Legacy
• Rapacious Dragon
• Sarkhan, Soul Aflame
• Savage Ventmaw
• Scaled Nurturer
• Scourge of Valkas
• Scourge of the Throne
• Temur Battlecrier
• Terror of the Peaks
• Thrakkus the Butcher
• Thunderbreak Regent
• Ureni of the Unwritten
• Wrathful Red Dragon
• Crucible of Fire
• Dracogenesis
• Dragon Tempest
• Elemental Bond
• Encroaching Dragonstorm
• Frontier Siege
• Garruk's Uprising
• Reflections of Littjara
• Temur Ascendancy
• Beast Within
• Chaos Warp
• Counterspell
• Dispelling Exhale
• Ghostly Flicker
• Negate
• Return of the Wildspeaker
• Sarkhan's Triumph
• Sarkhan Unbroken
• Blasphemous Act
• Cultivate
• Farseek
• Kodama's Reach
• Nature's Lore
• Rampant Growth
• Forest