Superfriends planeswalker deck built around Tam, the Possibility. Tam discounts planeswalker spells and, with all five colors open, proliferates once for each distinct planeswalker type in play, so a varied board of Teferis, Chandras, Elspeths and Jaces turns into a loyalty-pumping engine. Counter doublers, proliferators and extra-activation effects push walkers toward their ultimates, while cheap mana, walker-tutors and defensive pieces keep the board growing and protected. How it wins: The deck ramps planeswalkers to their ultimates and loyalty-based finishers, usually chaining extra turns through Teferi, Master of Time with Ichormoon Gauntlet and extra activations, while token armies, end-step burn and drain close out the opponents. Key roles: - Proliferate and counter engine: Tam, the Possibility plus repeatable and one-shot proliferate, along with doublers and replacement effects that add extra counters, multiply loyalty across every walker at once and turn each counter placed into more. (Tekuthal, Inquiry Dominus, Doubling Season, Atraxa, Praetors' Voice) - Extra activations and extra turns: These pieces let walkers use loyalty abilities more than once per turn, and Ichormoon Gauntlet gives every walker a free proliferate and a -12 extra turn. Teferi, Master of Time's -10 is the other extra-turn ultimate, and either Ichormoon Gauntlet with a repeat-activation piece or The Eternal Wanderer with Deepglow Skate supply the counters and activations to take turns forever. (Ichormoon Gauntlet, The Chain Veil, Oath of Teferi) - Planeswalker density and diversity: Many distinct walker types fuel Tam's proliferate count, and cards that find or cheat out walkers keep the stream going. The Jace token from the Way enchantments adds an extra type cheaply. (Carth the Lion, Entrust the Spark, Way of the Paradox) - Walker-focused mana: Fixing and cost reduction are restricted to or tuned for planeswalker spells, so five-color walkers come down early and Tam can be activated. Some walkers make mana themselves. (Gideon's Memorial, Oath of Ajani, Way of the Pyromancer) - Board protection and control: Token makers, attack taxes, bounce, wipes and removal keep opponents off the walkers. Some pieces stop walkers from dying at zero loyalty or phase the board out. (Elspeth, Storm Slayer, Onakke Oathkeeper, Sanctum Lurker) - Damage and drain finishers: Walkers that ping every opponent each turn or scale with the number of walkers in play turn a wide board into a clock. Nicol Bolas, Dragon-God's ultimate can win outright. (Chandra, Legacy of Fire, Commodore Guff, Nicol Bolas, Dragon-God)

Tam, the Possibility decklist

• Arcane Signet
• Chromatic Lantern
• Fellwar Stone
• Gideon's Memorial
• Ichormoon Gauntlet
• Sol Ring
• The Chain Veil
• Blood Crypt
• Breeding Pool
• City of Brass
• Command Tower
• Exotic Orchard
• Flooded Strand
• 2× Forest
• Godless Shrine
• Hallowed Fountain
• Interplanar Beacon
• 2× Island
• Karn's Bastion
• Mana Confluence
• Marsh Flats
• Misty Rainforest
• Mountain
• Overgrown Tomb
• 2× Plains
• Plaza of Heroes
• Polluted Delta
• Reflecting Pool
• Sacred Foundry
• Scalding Tarn
• Steam Vents
• Stomping Ground
• Swamp
• Temple Garden
• The World Tree
• Transformative Commons
• Verdant Catacombs
• Watery Grave
• Windswept Heath
• Wooded Foothills
• Atraxa, Praetors' Voice
• Birds of Paradise
• Bloom Tender
• Carth the Lion
• Deepglow Skate
• Delighted Halfling
• Evolution Sage
• Flux Channeler
• Lae'zel, Vlaakith's Champion
• Onakke Oathkeeper
• Sanctum Lurker
• Spark Double
• Tekuthal, Inquiry Dominus
• Brokers Ascendancy
• Doubling Season
• Oath of Ajani
• Oath of Nissa
• Oath of Teferi
• Way of the Necromancer
• Way of the Paradox
• Way of the Pyromancer
• Assassin's Trophy
• Counterspell
• Loyal Tutor
• Mutational Advantage
• Path to Exile
• Ripples of Potential
• Swords to Plowshares
• Ajani Unrelenting
• Chandra, Chill of Compliance
• Chandra, Legacy of Fire
• Chandra, Torch of Defiance
• Commodore Guff
• Elspeth, Storm Slayer
• Elspeth, Sun's Champion
• Jace, Multiverse Architect
• Liliana, Dreadhorde General
• Narset, Parter of Veils
• Nicol Bolas, Dragon-God
• Oko, Thief of Crowns
• Tamiyo, Field Researcher
• Teferi, Hero of Dominaria
• Teferi, Master of Time
• Teferi, Temporal Archmage
• Teferi, Time Raveler
• The Eternal Wanderer
• The Theorist, Jace Beleren
• Ugin, the Spirit Dragon
• Vraska, Betrayal's Sting
• Wrenn and Realmbreaker
• Blasphemous Act
• Entrust the Spark
• Farseek
• Nature's Lore
• Overwrite the Multiverse
• Swamp