PlayTest: Commander: Tekuthal, Inquiry Dominus by stormydaze

Format: Commander

Commander: Tekuthal, Inquiry Dominus

Bracket: 3

DeckCheck Threat Index: 40

Deck overview

Tekuthal, Inquiry Dominus commands a mono-blue poison and proliferate control deck designed to eliminate all three opponents simultaneously through lethal counter accumulation. The deck begins by applying initial poison counters using evasive threats like Blighted Agent or direct spells like Prologue to Phyresis. Once poison is established across the table, Tekuthal deploys to double every subsequent proliferate trigger. Repeatable proliferate sources—such as Contagion Engine, Inexorable Tide, Flux Channeler, and Viral Drake—rapidly accelerate poison counters from 1 to 10 within one to two turn cycles. Concurrently, the engine scales secondary resources by multiplying charge counters on Astral Cornucopia, +1/+1 counters on card drawers like Ingenious Prodigy, and -1/-1 counters on opposing creatures. The strategy is defended by efficient counterspells, shroud equipment, and all-inclusive phasing spells like Ripples of Potential. By bypassing combat damage and targeting restrictions, the deck turns any single poison counter into an inevitable, table-wide lethal clock.

Decklist (100 cards)

  • 1 Academy Ruins
  • 1 Adaptive Training Post
  • 1 Arcane Denial
  • 1 As Foretold
  • 1 Astral Cornucopia
  • 1 Blast Zone
  • 1 Blighted Agent
  • 1 Bring the Ending
  • 1 Buried Ruin
  • 1 Castle Vantress
  • 1 Chasm Skulker
  • 1 Chrome Host Seedshark
  • 1 Contagion Clasp
  • 1 Contagion Engine
  • 1 Contentious Plan
  • 1 Core Prowler
  • 1 Counterspell
  • 1 Curse of the Swine
  • 1 Deepglow Skate
  • 1 Diamond City
  • 1 Dramatic Reversal
  • 1 Dreamtide Whale
  • 1 Everflowing Chalice
  • 1 Expansion Algorithm
  • 1 Experimental Augury
  • 1 Fabricate
  • 1 Finale of Revelation
  • 1 Flux Channeler
  • 1 Grafted Exoskeleton
  • 1 Ichorclaw Myr
  • 1 Imprisoned in the Moon
  • 1 Inexorable Tide
  • 1 Ingenious Prodigy
  • 1 Inkmoth Nexus
  • 21 Island
  • 1 Karn's Bastion
  • 1 Lightning Greaves
  • 1 Lulu, Stern Guardian
  • 1 Lux Cannon
  • 1 Mage-Ring Network
  • 1 Malcolm, Alluring Scoundrel
  • 1 Mana Drain
  • 1 Maze of Ith
  • 1 Mesmerizing Dose
  • 1 Mirrex
  • 1 Muddle the Mixture
  • 1 Myojin of Cryptic Dreams
  • 1 Myr Convert
  • 1 Mystic Sanctuary
  • 1 Narset's Reversal
  • 1 Necropede
  • 1 Nesting Grounds
  • 1 Nykthos, Shrine to Nyx
  • 1 Ominous Seas
  • 1 Phyrexian Digester
  • 1 Plague Myr
  • 1 Prologue to Phyresis
  • 1 Radstorm
  • 1 Reliquary Tower
  • 1 Ripples of Potential
  • 1 Rogue's Passage
  • 1 Sapphire Medallion
  • 1 Serum Snare
  • 1 Sink into Stupor // Soporific Springs
  • 1 Slip Out the Back
  • 1 Sol Ring
  • 1 Solar Array
  • 1 Steady Progress
  • 1 Stonecoil Serpent
  • 1 Surge Conductor
  • 1 Swan Song
  • 1 Swiftfoot Boots
  • 1 Teferi, Master of Time
  • 1 Tekuthal, Inquiry Dominus
  • 1 Tezzeret's Gambit
  • 1 Tezzeret, Artifice Master
  • 1 Throne of Geth
  • 1 Titan Forge
  • 1 Viral Drake
  • 1 War Room