The Undercity is a dungeon it is a card that cannot be played, but is simply an extra dimension to the game
This isn't right 100% of the time, but most Limited decks end up looking like this, and, in general, it's what I would want to have
Alesha's Tiny Army Alesha, Who Smiles at Death | Illustration by Anastasia Ovchinnikova Commander (1) Creatures (32) Anger Azra Oddsmaker Blood Artist Carrion Feeder Chainer, Nightmare Adept Cruel Celebrant Duergar Hedge-Mage Eidolon of Rhetoric Fiend Hunter Gonti, Lord of Luxury Grand Abolisher Graveblade Marauder Grenzo, Dungeon Warden Grim Haruspex Imperial Recruiter Judith, the Scourge Diva Kiki-Jiki, Mirror Breaker Marionette Apprentice Master of Cruelties Mayhem Devil Midnight Reaper Mindblade Render Necrotic Sliver Recruiter of the Guard Selfless Spirit Siege-Gang Commander Sling-Gang Lieutenant Tymna the Weaver Virtus the Veiled Viscera Seer Yawgmoth, Thran Physician Zulaport Cutthroat Instants (5) Boros Charm Entomb Path to Exile Rally the Ancestors Thrill of Possibility Sorceries (11) Buried Alive Damn Diabolic Intent Dusk Faithless Looting Gamble Grim Tutor Mythos of Snapdax Ruinous Ultimatum Thrilling Discovery Victimize Enchantments (4) Goblin Bombardment Reconnaissance Smothering Tithe Tortured Existence Artifacts (11) Arcane Signet Boros Signet Key to the City Orzhov Signet Phyrexian Altar Rakdos Signet Skullclamp Sol Ring Talisman of Conviction Talisman of Hierarchy Talisman of Indulgence Lands (36) Arid Mesa Battlefield Forge Blood Crypt Bloodstained Mire Caves of Koilos Clifftop Retreat Command Tower Dragonskull Summit Exotic Orchard Fabled Passage Fetid Heath Godless Shrine Graven Cairns Mana Confluence Marsh Flats Mountain x5 Phyrexian Tower Plains x3 Reflecting Pool Rugged Prairie Sacred Foundry Savai Triome Shadowblood Ridge Shizo, Death's Storehouse Spectator Seating Swamp x3 Urborg, Tomb of Yawgmoth Vault of Champions I've always found Alesha, Who Smiles at Death to be such a unique commander
Spend X and then get all but two of that mana back
Add wheel effects, and suddenly everyone else discards their hand and draws exactly one card while you reload completely
Arcum's Astrolabe The common so powerful from Modern Horizons that it's been banned
