The Master of Keys (Commander) - Core Control

The Master of Keys
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Background image for Examining Duskmourn: House of Horror, One Year Later
Josh Nelson
Sep 26, 2025
Josh Nelson
Examining Duskmourn: House of Horror, One Year Later
Last time, we examined Bloomburrow and its cozy woodland vibes. Today, we're taking a much darker turn with Duskmourn: House of Horror!
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Enchantments
Battles
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Bender's Waterskin
14%inclusion1 decks7 decks
12%synergy
High Synergy Cards
Seal of Cleansing
89%inclusion8 decks9 decks
87%synergy
Ripples of Undeath
78%inclusion7 decks9 decks
75%synergy
Fear of Sleep Paralysis
78%inclusion7 decks9 decks
72%synergy
Mesa Enchantress
78%inclusion7 decks9 decks
69%synergy
Gravebreaker Lamia
67%inclusion6 decks9 decks
66%synergy
Entity Tracker
67%inclusion6 decks9 decks
60%synergy
Stillness in Motion
57%inclusion4 decks7 decks
57%synergy
Sage of Mysteries
56%inclusion5 decks9 decks
55%synergy
Seal of Removal
56%inclusion5 decks9 decks
55%synergy
Scrabbling Skullcrab
56%inclusion5 decks9 decks
54%synergy
Top Cards
Propaganda
67%inclusion6 decks9 decks
40%synergy
Starfield Mystic
56%inclusion5 decks9 decks
49%synergy
Inquisitive Glimmer
56%inclusion5 decks9 decks
48%synergy
Amphibian Downpour
56%inclusion5 decks9 decks
51%synergy
Doomwake Giant
56%inclusion5 decks9 decks
50%synergy
Animate Dead
56%inclusion5 decks9 decks
46%synergy
Grasp of Fate
44%inclusion4 decks9 decks
38%synergy
Sevinne's Reclamation
44%inclusion4 decks9 decks
36%synergy
Cacophony Unleashed
44%inclusion4 decks9 decks
43%synergy
Imprisoned in the Moon
44%inclusion4 decks9 decks
38%synergy
Game Changers
Thassa's Oracle
11%inclusion1 decks9 decks
1%synergy
Creatures
Demon of Fate's Design
44%inclusion4 decks9 decks
39%synergy
Fear of Impostors
44%inclusion4 decks9 decks
43%synergy
Ondu Spiritdancer
44%inclusion4 decks9 decks
38%synergy
Archon of Sun's Grace
33%inclusion3 decks9 decks
29%synergy
Overlord of the Balemurk
33%inclusion3 decks9 decks
31%synergy
Victor, Valgavoth's Seneschal
33%inclusion3 decks9 decks
31%synergy
Ancient Cellarspawn
33%inclusion3 decks9 decks
30%synergy
Grim Guardian
33%inclusion3 decks9 decks
31%synergy
Heliod, the Radiant Dawn
33%inclusion3 decks9 decks
29%synergy
Zur, Eternal Schemer
33%inclusion3 decks9 decks
30%synergy
Alseid of Life's Bounty
33%inclusion3 decks9 decks
32%synergy
Zur the Enchanter
33%inclusion3 decks9 decks
28%synergy
Mindwrack Harpy
33%inclusion3 decks9 decks
33%synergy
Witch Enchanter
22%inclusion2 decks9 decks
15%synergy
Overlord of the Floodpits
22%inclusion2 decks9 decks
18%synergy
Overlord of the Mistmoors
22%inclusion2 decks9 decks
20%synergy
Athreos, Shroud-Veiled
22%inclusion2 decks9 decks
18%synergy
Nashi, Searcher in the Dark
22%inclusion2 decks9 decks
22%synergy
Aminatou, Veil Piercer
22%inclusion2 decks9 decks
21%synergy
Summon: Yojimbo
14%inclusion1 decks7 decks
13%synergy
Qutrub Forayer
14%inclusion1 decks7 decks
14%synergy
Phenax, God of Deception
11%inclusion1 decks9 decks
11%synergy
Sludge Monster
11%inclusion1 decks9 decks
11%synergy
Kor Spiritdancer
11%inclusion1 decks9 decks
9%synergy
The Mindskinner
11%inclusion1 decks9 decks
10%synergy
Fear of Failed Tests
11%inclusion1 decks9 decks
11%synergy
Ertai, the Corrupted
11%inclusion1 decks9 decks
11%synergy
Archon of Falling Stars
11%inclusion1 decks9 decks
11%synergy
Lurrus of the Dream-Den
11%inclusion1 decks9 decks
9%synergy
Agent of Erebos
11%inclusion1 decks9 decks
11%synergy
Champions of Minas Tirith
11%inclusion1 decks9 decks
11%synergy
Faramir, Steward of Gondor
11%inclusion1 decks9 decks
11%synergy
Valley Floodcaller
11%inclusion1 decks9 decks
7%synergy
Zellix, Sanity Flayer
11%inclusion1 decks9 decks
11%synergy
Dream Eater
11%inclusion1 decks9 decks
11%synergy
Faceless Butcher
11%inclusion1 decks9 decks
11%synergy
Fear of Surveillance
11%inclusion1 decks9 decks
11%synergy
Tireless Tribe
11%inclusion1 decks9 decks
9%synergy
Horrid Shadowspinner
11%inclusion1 decks9 decks
11%synergy
Archon of Coronation
11%inclusion1 decks9 decks
11%synergy
Soaring Lightbringer
11%inclusion1 decks9 decks
6%synergy
Silent Hallcreeper
11%inclusion1 decks9 decks
7%synergy
Ashiok's Reaper
11%inclusion1 decks9 decks
11%synergy
Hedron Crab
11%inclusion1 decks9 decks
11%synergy
Boggart Trawler
11%inclusion1 decks9 decks
8%synergy
Barrowgoyf
11%inclusion1 decks9 decks
11%synergy
Dusk Mangler
11%inclusion1 decks9 decks
11%synergy
Windborn Muse
11%inclusion1 decks9 decks
9%synergy
Ravenous Chupacabra
11%inclusion1 decks9 decks
10%synergy
Sram, Senior Edificer
11%inclusion1 decks9 decks
6%synergy
Instants
Frantic Search
33%inclusion3 decks9 decks
16%synergy
Otherworldly Gaze
33%inclusion3 decks9 decks
31%synergy
Negate
22%inclusion2 decks9 decks
6%synergy
Dawn's Truce
22%inclusion2 decks9 decks
18%synergy
Thirst for Meaning
22%inclusion2 decks9 decks
21%synergy
Arcane Denial
22%inclusion2 decks9 decks
2%synergy
Swords to Plowshares
22%inclusion2 decks9 decks
-46%synergy
Sejiri Shelter
22%inclusion2 decks9 decks
21%synergy
Path to Exile
22%inclusion2 decks9 decks
-20%synergy
Inkshield
22%inclusion2 decks9 decks
13%synergy
Fell the Profane
11%inclusion1 decks9 decks
3%synergy
Dovin's Veto
11%inclusion1 decks9 decks
-14%synergy
An Offer You Can't Refuse
11%inclusion1 decks9 decks
-15%synergy
Refute
11%inclusion1 decks9 decks
8%synergy
Return to Dust
11%inclusion1 decks9 decks
7%synergy
Parting Gust
11%inclusion1 decks9 decks
11%synergy
Brainstorm
11%inclusion1 decks9 decks
-6%synergy
Render Silent
11%inclusion1 decks9 decks
7%synergy
Dark Ritual
11%inclusion1 decks9 decks
-8%synergy
Darkblast
11%inclusion1 decks9 decks
11%synergy
Void Rend
11%inclusion1 decks9 decks
-22%synergy
Read the Runes
11%inclusion1 decks9 decks
11%synergy
Curate
11%inclusion1 decks9 decks
11%synergy
Slip Out the Back
11%inclusion1 decks9 decks
10%synergy
Obscura Charm
11%inclusion1 decks9 decks
8%synergy
Disallow
11%inclusion1 decks9 decks
8%synergy
Snap
11%inclusion1 decks9 decks
9%synergy
Utter End
11%inclusion1 decks9 decks
4%synergy
Borne Upon a Wind
11%inclusion1 decks9 decks
6%synergy
March of Swirling Mist
11%inclusion1 decks9 decks
10%synergy
Don't Make a Sound
11%inclusion1 decks9 decks
11%synergy
Sorceries
Singularity Rupture
43%inclusion3 decks7 decks
40%synergy
Redress Fate
33%inclusion3 decks9 decks
27%synergy
Lively Dirge
22%inclusion2 decks9 decks
21%synergy
Open the Vaults
22%inclusion2 decks9 decks
21%synergy
Time Wipe
22%inclusion2 decks9 decks
15%synergy
Extinguish All Hope
22%inclusion2 decks9 decks
21%synergy
Dance of the Manse
22%inclusion2 decks9 decks
18%synergy
Space-Time Anomaly
14%inclusion1 decks7 decks
12%synergy
Ponder
11%inclusion1 decks9 decks
2%synergy
Unmarked Grave
11%inclusion1 decks9 decks
10%synergy
Ondu Inversion
11%inclusion1 decks9 decks
10%synergy
Unearth
11%inclusion1 decks9 decks
9%synergy
Replenish
11%inclusion1 decks9 decks
9%synergy
Curse of the Swine
11%inclusion1 decks9 decks
11%synergy
Read the Bones
11%inclusion1 decks9 decks
7%synergy
Rite of Oblivion
11%inclusion1 decks9 decks
10%synergy
Living Death
11%inclusion1 decks9 decks
7%synergy
Preordain
11%inclusion1 decks9 decks
6%synergy
Cleansing Nova
11%inclusion1 decks9 decks
7%synergy
Damn
11%inclusion1 decks9 decks
-9%synergy
Feast of Succession
11%inclusion1 decks9 decks
11%synergy
Breakthrough
11%inclusion1 decks9 decks
11%synergy
Final Vengeance
11%inclusion1 decks9 decks
11%synergy
Unburial Rites
11%inclusion1 decks9 decks
8%synergy
Portent
11%inclusion1 decks9 decks
8%synergy
Notion Rain
11%inclusion1 decks9 decks
11%synergy
Utility Artifacts
Wayfarer's Bauble
22%inclusion2 decks9 decks
14%synergy
Matzalantli, the Great Door
11%inclusion1 decks9 decks
9%synergy
Perpetual Timepiece
11%inclusion1 decks9 decks
11%synergy
Claws of Gix
11%inclusion1 decks9 decks
11%synergy
Altar of Dementia
11%inclusion1 decks9 decks
10%synergy
Bident of Thassa
11%inclusion1 decks9 decks
2%synergy
Enchantments
Seal of Doom
44%inclusion4 decks9 decks
44%synergy
Mirrormade
44%inclusion4 decks9 decks
35%synergy
Starfield of Nyx
44%inclusion4 decks9 decks
40%synergy
Ghostly Prison
44%inclusion4 decks9 decks
23%synergy
Unable to Scream
33%inclusion3 decks9 decks
32%synergy
Utter Insignificance
33%inclusion3 decks9 decks
33%synergy
Blind Obedience
33%inclusion3 decks9 decks
21%synergy
Estrid's Invocation
33%inclusion3 decks9 decks
29%synergy
Mystic Remora
33%inclusion3 decks9 decks
12%synergy
Sphere of Safety
33%inclusion3 decks9 decks
24%synergy
Monologue Tax
33%inclusion3 decks9 decks
27%synergy
Dress Down
33%inclusion3 decks9 decks
31%synergy
Painful Quandary
33%inclusion3 decks9 decks
31%synergy
Search for Azcanta
33%inclusion3 decks9 decks
32%synergy
Teval's Judgment
29%inclusion2 decks7 decks
28%synergy
Detention Sphere
22%inclusion2 decks9 decks
21%synergy
Court of Cunning
22%inclusion2 decks9 decks
21%synergy
Frozen Aether
22%inclusion2 decks9 decks
22%synergy
Aqueous Form
22%inclusion2 decks9 decks
19%synergy
Sigil of the Empty Throne
22%inclusion2 decks9 decks
16%synergy
Shardmage's Rescue
22%inclusion2 decks9 decks
22%synergy
Flooded Woodlands
22%inclusion2 decks9 decks
22%synergy
Chronic Flooding
22%inclusion2 decks9 decks
22%synergy
Leyline of Sanctity
22%inclusion2 decks9 decks
22%synergy
Soul Snare
22%inclusion2 decks9 decks
22%synergy
Duelist's Heritage
22%inclusion2 decks9 decks
20%synergy
Necromancy
22%inclusion2 decks9 decks
18%synergy
Boon of the Spirit Realm
22%inclusion2 decks9 decks
21%synergy
Birth of the Imperium
22%inclusion2 decks9 decks
20%synergy
Spirit-Sister's Call
22%inclusion2 decks9 decks
21%synergy
The Tale of Tamiyo
22%inclusion2 decks9 decks
22%synergy
The Restoration of Eiganjo
22%inclusion2 decks9 decks
22%synergy
Leyline of Anticipation
22%inclusion2 decks9 decks
18%synergy
Karmic Justice
22%inclusion2 decks9 decks
20%synergy
All That Glitters
22%inclusion2 decks9 decks
13%synergy
Curator's Ward
22%inclusion2 decks9 decks
19%synergy
Static Prison
22%inclusion2 decks9 decks
22%synergy
Bottomless Pool // Locker Room
22%inclusion2 decks9 decks
20%synergy
Eaten by Piranhas
22%inclusion2 decks9 decks
21%synergy
Secret Arcade // Dusty Parlor
22%inclusion2 decks9 decks
17%synergy
Solitary Confinement
22%inclusion2 decks9 decks
20%synergy
Nowhere to Run
22%inclusion2 decks9 decks
21%synergy
Ethereal Armor
22%inclusion2 decks9 decks
18%synergy
Hallowed Haunting
22%inclusion2 decks9 decks
20%synergy
Marchesa's Decree
22%inclusion2 decks9 decks
22%synergy
Phyrexian Arena
22%inclusion2 decks9 decks
8%synergy
Banishing Light
22%inclusion2 decks9 decks
21%synergy
Combat Research
22%inclusion2 decks9 decks
19%synergy
Fresh Start
14%inclusion1 decks7 decks
14%synergy
Eye of Nidhogg
14%inclusion1 decks7 decks
9%synergy
Battles
Invasion of Theros
11%inclusion1 decks9 decks
9%synergy
Planeswalkers
Ashiok, Dream Render
11%inclusion1 decks9 decks
9%synergy
Ashiok, Nightmare Muse
11%inclusion1 decks9 decks
11%synergy
Utility Lands
Bojuka Bog
44%inclusion4 decks9 decks
17%synergy
Hall of Heliod's Generosity
33%inclusion3 decks9 decks
20%synergy
Cephalid Coliseum
22%inclusion2 decks9 decks
19%synergy
Rogue's Passage
22%inclusion2 decks9 decks
13%synergy
Creeping Tar Pit
11%inclusion1 decks9 decks
10%synergy
Arcane Lighthouse
11%inclusion1 decks9 decks
10%synergy
Buried Ruin
11%inclusion1 decks9 decks
8%synergy
Shambling Vent
11%inclusion1 decks9 decks
10%synergy
War Room
11%inclusion1 decks9 decks
11%synergy
Emergence Zone
11%inclusion1 decks9 decks
9%synergy
Restless Anchorage
11%inclusion1 decks9 decks
10%synergy
Throne of the High City
11%inclusion1 decks9 decks
11%synergy
Drownyard Temple
11%inclusion1 decks9 decks
11%synergy
Mana Artifacts
Arcane Signet
78%inclusion7 decks9 decks
-10%synergy
Sol Ring
78%inclusion7 decks9 decks
-12%synergy
Talisman of Progress
67%inclusion6 decks9 decks
24%synergy
Talisman of Hierarchy
67%inclusion6 decks9 decks
24%synergy
Talisman of Dominance
56%inclusion5 decks9 decks
7%synergy
Azorius Signet
56%inclusion5 decks9 decks
23%synergy
Dimir Signet
22%inclusion2 decks9 decks
-11%synergy
Orzhov Signet
22%inclusion2 decks9 decks
-13%synergy
Commander's Sphere
11%inclusion1 decks9 decks
-8%synergy
Chromatic Lantern
11%inclusion1 decks9 decks
-2%synergy
Fellwar Stone
11%inclusion1 decks9 decks
-23%synergy
Coveted Jewel
11%inclusion1 decks9 decks
10%synergy
Mind Stone
11%inclusion1 decks9 decks
-2%synergy
Lands
Caves of Koilos
100%inclusion9 decks9 decks
65%synergy
Swamp
100%inclusion9 decks9 decks
9%synergy
Island
100%inclusion9 decks9 decks
7%synergy
Plains
100%inclusion9 decks9 decks
9%synergy
Command Tower
89%inclusion8 decks9 decks
-3%synergy
Contaminated Landscape
89%inclusion8 decks9 decks
74%synergy
Arcane Sanctum
89%inclusion8 decks9 decks
34%synergy
Adarkar Wastes
89%inclusion8 decks9 decks
58%synergy
Valgavoth's Lair
78%inclusion7 decks9 decks
75%synergy
Glacial Fortress
67%inclusion6 decks9 decks
27%synergy
Exotic Orchard
67%inclusion6 decks9 decks
8%synergy
Isolated Chapel
67%inclusion6 decks9 decks
29%synergy
Underground River
67%inclusion6 decks9 decks
34%synergy
Dimir Aqueduct
56%inclusion5 decks9 decks
41%synergy
Prairie Stream
56%inclusion5 decks9 decks
15%synergy
Sunken Hollow
56%inclusion5 decks9 decks
16%synergy
Temple of Silence
56%inclusion5 decks9 decks
36%synergy
Azorius Chancery
44%inclusion4 decks9 decks
30%synergy
Temple of Deceit
44%inclusion4 decks9 decks
26%synergy
Ash Barrens
44%inclusion4 decks9 decks
34%synergy
Skycloud Expanse
44%inclusion4 decks9 decks
30%synergy
Drowned Catacomb
44%inclusion4 decks9 decks
9%synergy
Evolving Wilds
44%inclusion4 decks9 decks
19%synergy
Path of Ancestry
44%inclusion4 decks9 decks
17%synergy
Obscura Storefront
44%inclusion4 decks9 decks
34%synergy
Tainted Isle
33%inclusion3 decks9 decks
27%synergy
Terramorphic Expanse
33%inclusion3 decks9 decks
16%synergy
Tainted Field
33%inclusion3 decks9 decks
26%synergy
Port Town
33%inclusion3 decks9 decks
16%synergy
Temple of Enlightenment
33%inclusion3 decks9 decks
16%synergy
Orzhov Basilica
33%inclusion3 decks9 decks
17%synergy
Choked Estuary
33%inclusion3 decks9 decks
17%synergy
Witch Enchanter
22%inclusion2 decks9 decks
15%synergy
Darkwater Catacombs
22%inclusion2 decks9 decks
8%synergy
Sea of Clouds
22%inclusion2 decks9 decks
-14%synergy
Raffine's Tower
22%inclusion2 decks9 decks
-19%synergy
Godless Shrine
22%inclusion2 decks9 decks
-28%synergy
Shineshadow Snarl
22%inclusion2 decks9 decks
12%synergy
Sejiri Shelter
22%inclusion2 decks9 decks
21%synergy
Watery Grave
22%inclusion2 decks9 decks
-27%synergy
Fell the Profane
11%inclusion1 decks9 decks
3%synergy
Gemstone Mine
11%inclusion1 decks9 decks
11%synergy
Ondu Inversion
11%inclusion1 decks9 decks
10%synergy
Fetid Pools
11%inclusion1 decks9 decks
4%synergy
Irrigated Farmland
11%inclusion1 decks9 decks
4%synergy
Shipwreck Marsh
11%inclusion1 decks9 decks
-10%synergy
Esper Panorama
11%inclusion1 decks9 decks
7%synergy
Boggart Trawler
11%inclusion1 decks9 decks
8%synergy
Morphic Pool
11%inclusion1 decks9 decks
-23%synergy
Gloomlake Verge
11%inclusion1 decks9 decks
0%synergy
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