Jorn wants the board packed with snow permanents, almost all snow lands plus snow mana rocks and snow creatures, so that each attack untaps all of them and the deck gets a second full round of snow mana every combat. That mana goes into {S}-hungry activations and X-scaling snow spells. Snow-count payoffs grow large, untappers like Rime Tender and Sculptor of Winter extend the mana loop, and Kaldring can replay snow permanents from the graveyard. The deck also has a Dark Depths with Thespian's Stage combo and Marit Lage's Slumber as an alternate route to a 20/20 Marit Lage. How it wins: It pushes damage through with snow-scaling attackers and pumpable fliers backed by huge mana each turn, or ends the game quickly with a hasty or evasive 20/20 Marit Lage made by the Dark Depths and Thespian's Stage combo or by Marit Lage's Slumber. Key roles: - Snow mana base and density: Snow lands, land fetching and snow artifacts raise the snow count and turn nearly every mana source into an {S} source for Jorn to untap (Into the North, Spirit of the Aldergard, Arcum's Astrolabe) - Untap and mana doubling: Jorn's attack trigger, snow untappers and end-step land untapping generate repeated bursts of mana, and unspent mana carries over between phases instead of being lost (Rime Tender, Wilderness Reclamation, Kruphix, God of Horizons) - Snow mana sinks: Repeatable {S} activations and X-scaled snow spells turn the extra mana into cards, pumps, board control and reanimation (Ascendant Spirit, Graven Lore, Blood on the Snow) - Snow-scaling threats: Creatures and effects that grow with the number of snow permanents become the main beaters and one-sided sweepers (Abominable Treefolk, Rimefeather Owl, Dead of Winter) - Marit Lage package: Dark Depths can be broken by Thespian's Stage or slowly with mana, and a snow-heavy board fires Marit Lage's Slumber, giving the deck a 20/20 finisher (Dark Depths, Thespian's Stage, Marit Lage's Slumber) - Tap-down lockdown: Freeze effects and skipped untaps keep opposing blockers and mana sources tapped while Jorn and the untappers ignore the restriction for its own snow permanents (Stasis, Icebreaker Kraken, Winter's Rest)

Jorn, God of Winter decklist

• Abominable Treefolk
• An Offer You Can't Refuse
• Arcane Signet
• Arcum's Astrolabe
• Ascendant Spirit
• Assassin's Trophy
• Avalanche Caller
• Beast Within
• Blessing of Frost
• Blizzard Brawl
• Blizzard Specter
• Blood on the Snow
• Boreal Druid
• Boreal Outrider
• Coldsteel Heart
• Command Tower
• Conifer Wurm
• Counterspell
• Cultivate
• Dark Depths
• Dead of Winter
• Draugr Necromancer
• Evolving Wilds
• Faceless Haven
• Farseek
• Forest
• Frost Augur
• Frost Marsh
• Frostwalk Bastion
• Glacial Revelation
• Glittering Frost
• Graven Lore
• Growth Spiral
• Hailstorm Valkyrie
• Heidar, Rimewind Master
• Heroic Intervention
• Horizon Stone
• Ice Tunnel
• Ice-Fang Coatl
• Iceberg Cancrix
• Icebind Pillar
• Icebreaker Kraken
• Into the North
• Kodama's Reach
• Kruphix, God of Horizons
• Lightning Greaves
• Marit Lage's Slumber
• Moritte of the Frost
• Mouth of Ronom
• Narfi, Betrayer King
• Negate
• Ohran Frostfang
• Ohran Viper
• Pilfering Hawk
• Priest of the Haunted Edge
• Pull from Tomorrow
• Replicating Ring
• Rime Tender
• Rime Transfusion
• Rimefeather Owl
• Rimewind Cryomancer
• Rimewood Falls
• Scrying Sheets
• Sculptor of Winter
• Shimmerdrift Vale
• 9× Snow-Covered Forest
• 8× Snow-Covered Island
• 5× Snow-Covered Swamp
• Sol Ring
• Spirit of the Aldergard
• Stasis
• Swamp
• Swiftfoot Boots
• The Three Seasons
• Thespian's Stage
• Wild Growth
• Wilderness Reclamation
• Winter's Chill
• Winter's Rest
• Woodland Chasm