The Ur-Dragon leads a five-color Dragon tribal deck that leverages cost reduction from both the commander's eminence ability and other cost-reducing effects to flood the battlefield with massive flying Dragons ahead of schedule. Attacking with Dragons triggers The Ur-Dragon to draw cards equal to the number of attackers and cheat additional permanents directly onto the battlefield, creating a snowballing advantage engine that rewards going wide with the Dragon tribe. The deck wins through overwhelming combat damage accelerated by token doublers like Miirym, Sentinel Wyrm and exponential token generators like Utvara Hellkite, while Call the Spirit Dragons offers an alternate win condition by placing five counters on five differently colored Dragons at the beginning of upkeep.

The Ur-Dragon decklist

• Miirym, Sentinel Wyrm
• Sivitri, Dragon Master
• Sarkhan the Masterless
• Aesi, Tyrant of Gyre Strait
• Dragonspeaker Shaman
• Temur Battlecrier
• Dragonmaster Outcast
• Clone
• Tiamat
• Dragonlord Dromoka
• Bladewing the Risen
• Ureni of the Unwritten
• Teval, the Balanced Scale
• Lathliss, Dragon Queen
• Wrathful Red Dragon
• Utvara Hellkite
• Hellkite Tyrant
• Ancestor Dragon
• Timeless Dragon
• Wardscale Dragon
• Deathbringer Regent
• Noxious Dragon
• Iymrith, Desert Doom
• Marang River Regent
• Bloomvine Regent
• Draconic Muralists
• Exploration
• Dracogenesis
• Call the Spirit Dragons
• Dragonback Assault
• Rite of the Dragoncaller
• Dragon Tempest
• Ring of Three Wishes
• Mox Jasper
• Thought Vessel
• Spellbook
• Timeless Lotus
• Dragonstorm Globe
• Planar Portal
• Quicksilver Amulet
• Crux of Fate
• Mastermind's Acquisition
• Diabolic Tutor
• Crawl from the Cellar
• Morgue Theft
• Dryad's Revival
• Bygone Marvels
• All Suns' Dawn
• Phytoburst
• Nature's Rhythm
• Dragonstorm
• Resurrection
• Haven of the Spirit Dragon
• Maelstrom of the Spirit Dragon
• 4× Island
• 4× Swamp
• 4× Forest
• 4× Plains
• 4× Mountain
• Temple of Abandon
• Temple of Silence
• Temple of Plenty
• Temple of Triumph
• Temple of Deceit
• Temple of Enlightenment
• Temple of Epiphany
• Temple of Malady
• Temple of Malice
• Temple of Mystery
• Thornwood Falls
• Scoured Barrens
• Swiftwater Cliffs
• Tranquil Cove
• Wind-Scarred Crag
• Blossoming Sands
• Bloodfell Caves
• Dismal Backwater
• Jungle Hollow
• Rugged Highlands
• Breath of Life
• In Bolas's Clutches
• Confiscate
• Mind Control