Undercity Card // The Initiative Card was first released in the set Commander Legends: Battle for Baldur's Gate, illustrated by Ioannis Fiore & Ioannis Fiore
You can play with the Secret Lair drops within Magic: The Gathering Eternal formats, which are Commander, Legacy, Vintage, and Pauper
Definition 2, Chance Encounters Wyll, Blade of Frontiers by Mads Ahm Feeling lucky, punk
I don't actually recommend Doubling Season because it's overcosted if you only use half the card More Counters on Themselves: Avenger of Zendikar especially if you add more fetchlands and land ramp, also Taurean Mauler is a worse Managorger Hydra but still amazing with our commander Draw: The Great Henge, Tribute to the World Tree, Esper Sentinel Ramp: Kodama of the West Tree, Defiler of Vigor, Biophagus Protection: Shalai, Voice of Plenty, Deflecting Swat, Bolt Bend, Heroic Intervention, Teferi's Protection, Clever Concealment, Silkguard Combos: Heliod, Sun-Crowned and War Elemental do the same thing as The Red Terror