Call of Cthulhu by user1798809

Format: Commander

Commander: Runo Stromkirk // Krothuss, Lord of the Deep

Bracket: 3

DeckCheck Threat Index: 23

Deck overview

This Dimir deck is built around Runo Stromkirk, aiming to transform him into Krothuss, Lord of the Deep by stacking the top of the library with high-mana-value Krakens, Leviathans, Octopuses, and Serpents. Once Krothuss attacks alongside a massive Sea Monster, he duplicates it twice, flooding the battlefield with colossal attacking threats. Supported by self-mill and graveyard interaction, the deck uses filtering tools like Brainstorm and Otherworldly Gaze to ensure reliable transformations. While its late-game combat output is devastating—often overwhelming tables through unblockable damage from Stormtide Leviathan or catastrophic library destruction from Fleet Swallower—the deck is constrained by a light mana base of 31 lands and limited ramp. Opponents face prolonged combat clocks once Krothuss is active, but the reliance on high-cost creatures and combat-phase triggers leaves the engine vulnerable to well-timed removal and sweepers.

Decklist (100 cards)

  • 1 Academy Ruins
  • 1 Ashiok, Nightmare Muse
  • 1 Ashiok, Sculptor of Fears
  • 1 Black Cat
  • 1 Brainstorm
  • 1 Calculated Dismissal
  • 1 Codex Shredder
  • 1 Command Tower
  • 1 Consuming Aberration
  • 1 Cosmic Horror
  • 1 Counterspell
  • 1 Dark Depths
  • 1 Dark Ritual
  • 1 Darkwater Catacombs
  • 1 Dauthi Voidwalker
  • 1 Deep-Sea Kraken
  • 1 Delver of Secrets // Insectile Aberration
  • 1 Deranged Assistant
  • 1 Devourer of Memory
  • 1 Dimir Charm
  • 1 Dimir Doppelganger
  • 1 Dread Presence
  • 1 Drowned Secrets
  • 1 Duskmantle, House of Shadow
  • 1 Engulf the Shore
  • 1 Extract from Darkness
  • 1 Fact or Fiction
  • 1 Fleet Swallower
  • 1 Flood of Recollection
  • 1 Forbidden Alchemy
  • 1 Fractured Sanity
  • 1 Geier Reach Sanitarium
  • 1 Glimpse the Unthinkable
  • 1 Grindclock
  • 1 Guiltfeeder
  • 1 Gyruda, Doom of Depths
  • 1 Hedron Crab
  • 1 Hullbreaker Horror
  • 11 Island
  • 1 Laboratory Maniac
  • 1 Lazav, Dimir Mastermind
  • 1 Maddening Cacophony
  • 1 Mind Funeral
  • 1 Mind Stone
  • 1 Mindcrank
  • 1 Nadir Kraken
  • 1 Negate
  • 1 Nemesis of Reason
  • 1 Nephalia Drownyard
  • 1 Notion Rain
  • 1 Ominous Seas
  • 1 Orvar, the All-Form
  • 1 Otherworldly Gaze
  • 1 Paranoid Delusions
  • 1 Peer into the Abyss
  • 1 Phenax, God of Deception
  • 1 Psychic Corrosion
  • 1 Quest for Ula's Temple
  • 1 Reliquary Tower
  • 1 River of Tears
  • 1 Ruin Crab
  • 1 Runo Stromkirk // Krothuss, Lord of the Deep
  • 1 Sewer Nemesis
  • 1 Sludge Monster
  • 1 Sol Ring
  • 1 Stolen Identity
  • 1 Stormtide Leviathan
  • 1 Sunken Hollow
  • 10 Swamp
  • 1 Thassa's Oracle
  • 1 The Haunt of Hightower
  • 1 Thespian's Stage
  • 1 Thief of Sanity
  • 1 Thing in the Ice // Awoken Horror
  • 1 Thought Collapse
  • 1 Underworld Dreams
  • 1 Unsummon
  • 1 Vampire Hexmage
  • 1 Wharf Infiltrator
  • 1 Wrexial, the Risen Deep
  • 1 Zellix, Sanity Flayer