Curiosity Did Not Kill the Cat

Y'shtola, Night's Blessed Commander Deck

Y'shtola, Night's Blessed is the engine of this deck, draining opponents' life totals through repeated triggers that deal 2 damage and gain 2 life whenever a high-cost noncreature spell is cast, while also drawing cards whenever 4 or more life is lost in a turn. The deck leans heavily into copying Y'shtola herself using clone and doubling effects so that multiple instances of her triggered ability fire simultaneously, and commander-count-scaling spells like Skull Storm and Roaming Throne amplify this approach by multiplying damage triggers or doubling them outright. The win condition is grinding opponents to zero through cascading life loss from spell-casting triggers, with large X-cost drain spells like Exsanguinate and Debt to the Deathless serving as finishers backed by a deep mana base.

Decklist

• 3× Island
• 2× Plains
• 2× Swamp
• Arcane Signet
• Command Tower
• Exsanguinate
• Sakashima the Impostor
• Sol Ring
• Chromatic Orrery
• Peer into the Abyss
• Fellwar Stone
• Dimir Signet
• Exotic Orchard
• Orzhov Signet
• Underground River
• Temporal Mastery
• Thought Vessel
• Echo Storm
• Mana Drain
• Adarkar Wastes
• City of Brass
• Bloodstained Mire
• Flooded Strand
• Godless Shrine
• Decree of Pain
• Toxic Deluge
• Verdant Catacombs
• Mana Confluence
• Polluted Delta
• Windswept Heath
• Caves of Koilos
• Talisman of Progress
• Talisman of Dominance
• Reflecting Pool
• Cavern of Souls
• Hallowed Fountain
• Azorius Signet
• Commence the Endgame
• Spark Double
• Prismatic Vista
• Shark Typhoon
• Rise of the Dark Realms
• Kindred Discovery
• Skull Storm
• Debt to the Deathless
• Mnemonic Deluge
• Sakashima of a Thousand Faces
• Commander's Insight
• Inkshield
• Otawara, Soaring City
• Raffine's Tower
• Irenicus's Vile Duplication
• Font of Magic
• Black Market Connections
• Breach the Multiverse
• Roaming Throne
• Chimil, the Inner Sun
• Meticulous Archive
• Shadowy Backstreet
• Undercity Sewers
• Unexplained Absence
• Heartless Conscription
• Monumental Henge
• Horizon of Progress
• Mirror Room // Fractured Realm
• Galadriel's Dismissal
• Quantum Misalignment
• Multiversal Passage
• The Soul Stone
• The Clone Saga
• Spirit Water Revival
• Ember Island Production
• Mirrorform
• Abundant Countryside
• Dream Harvest
• Mathemagics
• Irma, Part-Time Mutant
• Here Comes a New Hero!
• The Mind Stone
• Multiversal Incursion
• Loki, Lord of Misrule
• Taskmaster, Mercenary Mimic
• Chameleon, Master of Disguise
• Flash Photography
• Watery Grave
• Gilded Lotus
• Marsh Flats
• Misty Rainforest
• Scalding Tarn
• Arid Mesa
• Talisman of Hierarchy
• Raise the Palisade
• Dig Through Time
• Clever Concealment