Thassa, Deep-Dwelling helms a flicker-based control deck that repeatedly blinks enters-the-battlefield creatures to generate continuous value through card draw, creature theft, and counterspell recursion. The deck builds toward an infinite turns lock by combining Thassa's end-step flicker with Archaeomancer and extra turn spells like Time Warp, recycling the same extra turn indefinitely while opponents are locked out. A deep suite of flash enablers, counterspells, and bounce effects keeps the board clear and opponents reactive while the combo assembles.

Thassa decklist

• Mystic Sanctuary
• Cloudkin Seer
• Fblthp, the Lost
• Floodgate
• Reliquary Tower
• Rhystic Study
• Solemn Simulacrum
• Tormod's Crypt
• Barrin, Tolarian Archmage
• Agent of Treachery
• Lonely Sandbar
• Myriad Landscape
• Strionic Resonator
• Vedalken Shackles
• Vedalken Aethermage
• Mnemonic Wall
• Spellseeker
• Duplicant
• Archaeomancer
• Scavenger Grounds
• Sea Gate Oracle
• Glen Elendra Archmage
• Trinket Mage
• Voidmage Prodigy
• Steal Enchantment
• Thalakos Seer
• Palinchron
• Strip Mine
• Emergence Zone
• Tribute Mage
• Watcher for Tomorrow
• Mulldrifter
• Mind Stone
• Sower of Temptation
• Mystic Remora
• Wavebreak Hippocamp
• Cyclonic Rift
• Pongify
• Buried Ruin
• Riptide Laboratory
• Forcefield
• Walking Atlas
• Ixidron
• 23× Island
• Panharmonicon
• Engulf the Shore
• Blackblade Reforged
• Naban, Dean of Iteration
• Consecrated Sphinx
• Nykthos, Shrine to Nyx
• Chamber of Manipulation
• Glasspool Mimic // Glasspool Shore
• Scourge of Fleets
• Thought Vessel
• Sakashima of a Thousand Faces
• Mana Drain
• Spectral Deluge
• Pact of Negation
• Teferi, Mage of Zhalfir
• Step Through
• Mind Flayer
• Sludge Monster
• Imprisoned in the Moon
• Jin-Gitaxias, Progress Tyrant
• March of Swirling Mist
• Muddle the Mixture
• Sakashima the Impostor
• Oblivion Stone
• Shield Broker
• Leyline of Anticipation
• Force of Negation
• Blast Zone
• Peregrine Drake
• Halo-Charged Skaab
• Sol Ring
• Liquimetal Torque
• Training Grounds
• Swan Song
• Virtue of Knowledge // Vantress Visions
• Cyber Conversion
• Kitesail Larcenist
• Scampering Surveyor
• Evacuation
• Spark Double
• Rapid Hybridization
• Final-Word Phantom
• Phyrexian Metamorph
• Arcane Lighthouse
• Struggle for Project Purity
• Serum Visionary
• Sapphire Medallion
• Sink into Stupor // Soporific Springs
• Demolition Field
• Brotherhood Regalia
• Dour Port-Mage
• Eluge, the Shoreless Sea
• Aetherize
• Temporal Manipulation
• Reality Shift
• Shipwreck Dowser
• Terrain Generator
• High Fae Trickster
• Domineering Will
• Aether Channeler
• Venser, Shaper Savant
• Laboratory Maniac
• An Offer You Can't Refuse
• PuPu UFO
• Dauntless Scrapbot
• Capture of Jingzhou
• Waterbending Scroll
• Glen Elendra Guardian
• Emeritus of Ideation // Ancestral Recall
• H.E.R.B.I.E. Scout Unit
• Time Warp
• Galactus, Devourer of Worlds
• Chameleon, Master of Disguise
• Propaganda
• Whispersilk Cloak
• Rogue's Passage
• Flesh Duplicate
• Ray of Command