The Master of Keys (Commander) - Core

The Master of Keys
Rank #315
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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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Instants
Sorceries
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Enchantments
Battles
Utility Lands
Mana Artifacts
Lands
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Air Nomad Legacy
2.9%inclusion1 decks34 decks
2%synergy
Waterbender Ascension
2.9%inclusion1 decks35 decks
2%synergy
Bender's Waterskin
2.4%inclusion2 decks85 decks
0%synergy
Path to Redemption
1.2%inclusion1 decks85 decks
1%synergy
The Rise of Sozin
1.2%inclusion1 decks86 decks
1%synergy
High Synergy Cards
Inquisitive Glimmer
76%inclusion279 decks366 decks
68%synergy
Mesa Enchantress
77%inclusion281 decks366 decks
68%synergy
Starfield Mystic
70%inclusion258 decks366 decks
64%synergy
Entity Tracker
66%inclusion241 decks366 decks
59%synergy
Demon of Fate's Design
63%inclusion231 decks366 decks
58%synergy
Doomwake Giant
63%inclusion229 decks366 decks
57%synergy
Ripples of Undeath
55%inclusion200 decks366 decks
52%synergy
Fear of Sleep Paralysis
57%inclusion209 decks366 decks
51%synergy
Scrabbling Skullcrab
51%inclusion188 decks366 decks
50%synergy
Gravebreaker Lamia
51%inclusion186 decks366 decks
50%synergy
Top Cards
Secret Arcade // Dusty Parlor
53%inclusion193 decks366 decks
47%synergy
Ondu Spiritdancer
52%inclusion192 decks366 decks
46%synergy
Sigil of the Empty Throne
52%inclusion191 decks366 decks
46%synergy
Swords to Plowshares
52%inclusion189 decks366 decks
-17%synergy
Mirrormade
51%inclusion185 decks366 decks
41%synergy
Sphere of Safety
50%inclusion184 decks366 decks
41%synergy
Redress Fate
47%inclusion172 decks366 decks
41%synergy
Victor, Valgavoth's Seneschal
46%inclusion168 decks366 decks
44%synergy
Fear of Impostors
42%inclusion152 decks366 decks
40%synergy
Animate Dead
41%inclusion151 decks366 decks
31%synergy
Creatures
Soaring Lightbringer
40%inclusion145 decks366 decks
34%synergy
Overlord of the Floodpits
40%inclusion145 decks366 decks
36%synergy
Ghostly Dancers
38%inclusion139 decks366 decks
35%synergy
Overlord of the Balemurk
35%inclusion127 decks366 decks
33%synergy
Aminatou, Veil Piercer
32%inclusion118 decks366 decks
31%synergy
Moon-Blessed Cleric
31%inclusion113 decks366 decks
26%synergy
Heliod, the Radiant Dawn
30%inclusion111 decks366 decks
26%synergy
Zur, Eternal Schemer
30%inclusion108 decks366 decks
26%synergy
Enduring Curiosity
29%inclusion106 decks366 decks
21%synergy
Silent Hallcreeper
28%inclusion104 decks366 decks
24%synergy
Archon of Sun's Grace
28%inclusion103 decks366 decks
23%synergy
Grim Guardian
27%inclusion98 decks366 decks
24%synergy
Athreos, Shroud-Veiled
25%inclusion93 decks366 decks
21%synergy
Skullsnap Nuisance
22%inclusion81 decks366 decks
22%synergy
Archetype of Imagination
22%inclusion80 decks366 decks
17%synergy
Zur the Enchanter
22%inclusion80 decks366 decks
17%synergy
Mindwrack Harpy
21%inclusion77 decks366 decks
21%synergy
Sage of Mysteries
20%inclusion74 decks366 decks
20%synergy
Ancient Cellarspawn
19%inclusion71 decks366 decks
16%synergy
Alseid of Life's Bounty
17%inclusion64 decks366 decks
16%synergy
Overlord of the Mistmoors
17%inclusion62 decks366 decks
15%synergy
Balemurk Leech
17%inclusion62 decks366 decks
16%synergy
Nightmare Shepherd
16%inclusion58 decks366 decks
13%synergy
Spirited Companion
15%inclusion54 decks366 decks
13%synergy
Auramancer
15%inclusion54 decks366 decks
12%synergy
Gremlin Tamer
14%inclusion52 decks366 decks
13%synergy
Solemn Simulacrum
13%inclusion49 decks366 decks
-2%synergy
Fear of Infinity
13%inclusion46 decks366 decks
12%synergy
Nashi, Searcher in the Dark
13%inclusion46 decks366 decks
12%synergy
Summon: Yojimbo
12%inclusion15 decks130 decks
11%synergy
Metamorphosis Fanatic
10%inclusion37 decks366 decks
5%synergy
Starnheim Courser
10%inclusion35 decks366 decks
6%synergy
Arvinox, the Mind Flail
8.7%inclusion32 decks366 decks
7%synergy
Creeping Peeper
8.5%inclusion31 decks366 decks
8%synergy
Sun Titan
7.7%inclusion28 decks366 decks
-1%synergy
Millikin
7.7%inclusion28 decks366 decks
7%synergy
Burnished Hart
6.8%inclusion25 decks366 decks
3%synergy
Stenn, Paranoid Partisan
6.6%inclusion24 decks366 decks
5%synergy
Enduring Innocence
6.6%inclusion24 decks366 decks
5%synergy
Witch Enchanter
6.0%inclusion22 decks366 decks
-1%synergy
Fear of Surveillance
6.0%inclusion22 decks366 decks
6%synergy
Phenomenon Investigators
5.7%inclusion21 decks366 decks
5%synergy
Stitcher's Supplier
5.7%inclusion21 decks366 decks
5%synergy
Dream Eater
5.5%inclusion20 decks366 decks
5%synergy
Enduring Tenacity
5.5%inclusion20 decks366 decks
-2%synergy
Ashiok's Reaper
5.5%inclusion20 decks366 decks
5%synergy
Ghostly Keybearer
5.5%inclusion20 decks366 decks
5%synergy
Summon: Primal Odin
5.4%inclusion7 decks130 decks
1%synergy
Fear of Failed Tests
5.2%inclusion19 decks366 decks
5%synergy
Deranged Assistant
5.2%inclusion19 decks366 decks
5%synergy
Instants
Arcane Denial
37%inclusion135 decks366 decks
17%synergy
Thirst for Meaning
31%inclusion113 decks366 decks
29%synergy
Path to Exile
28%inclusion103 decks366 decks
-14%synergy
Otherworldly Gaze
24%inclusion89 decks366 decks
22%synergy
Counterspell
24%inclusion87 decks366 decks
-17%synergy
Inkshield
22%inclusion81 decks366 decks
13%synergy
Void Rend
20%inclusion74 decks366 decks
-13%synergy
An Offer You Can't Refuse
18%inclusion66 decks366 decks
-8%synergy
Frantic Search
17%inclusion61 decks366 decks
0%synergy
Utter End
15%inclusion55 decks366 decks
8%synergy
Negate
15%inclusion55 decks366 decks
-2%synergy
Brainstorm
13%inclusion48 decks366 decks
-4%synergy
Dark Ritual
10%inclusion38 decks366 decks
-9%synergy
Return to Dust
10%inclusion37 decks366 decks
6%synergy
Dovin's Veto
10%inclusion35 decks366 decks
-15%synergy
Generous Gift
7.9%inclusion29 decks366 decks
-7%synergy
Fact or Fiction
7.1%inclusion26 decks366 decks
3%synergy
Fell the Profane
6.6%inclusion24 decks366 decks
-2%synergy
Entomb
6.6%inclusion24 decks366 decks
0%synergy
Unwanted Remake
6.0%inclusion22 decks366 decks
5%synergy
Anguished Unmaking
6.0%inclusion22 decks366 decks
-19%synergy
Swan Song
6.0%inclusion22 decks366 decks
-13%synergy
Sink into Stupor
6.0%inclusion22 decks366 decks
-6%synergy
Telling Time
5.5%inclusion20 decks366 decks
3%synergy
Withering Torment
5.2%inclusion19 decks366 decks
3%synergy
Sorceries
Sevinne's Reclamation
31%inclusion113 decks366 decks
22%synergy
Time Wipe
27%inclusion99 decks366 decks
20%synergy
Extinguish All Hope
25%inclusion90 decks366 decks
23%synergy
Dance of the Manse
24%inclusion88 decks366 decks
20%synergy
Windfall
17%inclusion62 decks366 decks
3%synergy
Singularity Rupture
14%inclusion14 decks98 decks
12%synergy
Resurgent Belief
13%inclusion49 decks366 decks
11%synergy
Damn
12%inclusion45 decks366 decks
-8%synergy
Reanimate
11%inclusion41 decks366 decks
-5%synergy
Terminus
11%inclusion40 decks366 decks
7%synergy
Ponder
10%inclusion37 decks366 decks
1%synergy
Glimpse the Unthinkable
10%inclusion35 decks366 decks
9%synergy
Read the Bones
8.5%inclusion31 decks366 decks
4%synergy
Space-Time Anomaly
8.3%inclusion8 decks96 decks
7%synergy
Brilliant Restoration
8.2%inclusion30 decks366 decks
6%synergy
Toxic Deluge
7.7%inclusion28 decks366 decks
-12%synergy
Diabolic Vision
6.0%inclusion22 decks366 decks
4%synergy
Austere Command
6.0%inclusion22 decks366 decks
-3%synergy
Portent
5.7%inclusion21 decks366 decks
2%synergy
Commune with Evil
5.5%inclusion20 decks366 decks
5%synergy
Open the Vaults
5.5%inclusion20 decks366 decks
4%synergy
Aminatou's Augury
5.2%inclusion19 decks366 decks
4%synergy
Utility Artifacts
Cloud Key
12%inclusion43 decks366 decks
8%synergy
Wayfarer's Bauble
10%inclusion36 decks366 decks
1%synergy
Keys to the House
9.3%inclusion34 decks365 decks
9%synergy
Lightning Greaves
8.7%inclusion32 decks366 decks
-14%synergy
Mesmeric Orb
7.7%inclusion28 decks366 decks
6%synergy
Whip of Erebos
5.7%inclusion21 decks366 decks
4%synergy
Perpetual Timepiece
5.7%inclusion21 decks366 decks
5%synergy
Swiftfoot Boots
5.2%inclusion19 decks366 decks
-19%synergy
Enchantments
Seal of Cleansing
41%inclusion151 decks366 decks
40%synergy
Grasp of Fate
41%inclusion150 decks366 decks
35%synergy
Dress Down
40%inclusion148 decks366 decks
38%synergy
Cemetery Tampering
39%inclusion141 decks366 decks
38%synergy
Monologue Tax
39%inclusion141 decks366 decks
32%synergy
Defiled Crypt // Cadaver Lab
38%inclusion139 decks365 decks
37%synergy
Cacophony Unleashed
35%inclusion128 decks366 decks
33%synergy
Propaganda
34%inclusion124 decks366 decks
8%synergy
Shark Typhoon
33%inclusion121 decks366 decks
27%synergy
Bottomless Pool // Locker Room
31%inclusion115 decks366 decks
29%synergy
Timely Ward
31%inclusion113 decks366 decks
26%synergy
Amphibian Downpour
30%inclusion111 decks366 decks
26%synergy
Estrid's Invocation
30%inclusion111 decks366 decks
26%synergy
Ethereal Armor
29%inclusion106 decks366 decks
24%synergy
Extravagant Replication
29%inclusion106 decks366 decks
24%synergy
All That Glitters
28%inclusion102 decks366 decks
19%synergy
Ghostly Prison
27%inclusion99 decks366 decks
6%synergy
Polluted Cistern // Dim Oubliette
27%inclusion98 decks366 decks
26%synergy
Mystic Remora
26%inclusion96 decks366 decks
5%synergy
The Eldest Reborn
26%inclusion96 decks366 decks
24%synergy
Stillness in Motion
26%inclusion41 decks160 decks
25%synergy
Cramped Vents // Access Maze
25%inclusion93 decks366 decks
23%synergy
Necromancy
25%inclusion92 decks366 decks
20%synergy
The Tale of Tamiyo
24%inclusion89 decks366 decks
24%synergy
Darksteel Mutation
24%inclusion87 decks366 decks
17%synergy
Mirror Room // Fractured Realm
22%inclusion81 decks366 decks
20%synergy
Starfield of Nyx
22%inclusion79 decks366 decks
17%synergy
Restricted Office // Lecture Hall
21%inclusion78 decks366 decks
19%synergy
Blind Obedience
19%inclusion71 decks366 decks
7%synergy
Imprisoned in the Moon
19%inclusion70 decks366 decks
13%synergy
Central Elevator // Promising Stairs
19%inclusion69 decks366 decks
18%synergy
Seal of Removal
19%inclusion68 decks366 decks
18%synergy
Secrets of the Dead
19%inclusion68 decks366 decks
18%synergy
Sheltered by Ghosts
18%inclusion66 decks366 decks
15%synergy
Hallowed Haunting
18%inclusion66 decks366 decks
16%synergy
One with the Multiverse
18%inclusion65 decks366 decks
13%synergy
Dazzling Theater // Prop Room
18%inclusion64 decks365 decks
16%synergy
Phyrexian Arena
17%inclusion64 decks366 decks
4%synergy
Derelict Attic // Widow's Walk
17%inclusion63 decks364 decks
17%synergy
Cast Out
17%inclusion63 decks366 decks
14%synergy
Meat Locker // Drowned Diner
16%inclusion59 decks364 decks
16%synergy
Copy Enchantment
15%inclusion56 decks366 decks
11%synergy
Underwater Tunnel // Slimy Aquarium
15%inclusion55 decks365 decks
15%synergy
Unable to Scream
15%inclusion55 decks366 decks
14%synergy
Spirit-Sister's Call
15%inclusion54 decks366 decks
14%synergy
Surgical Suite // Hospital Room
14%inclusion50 decks366 decks
13%synergy
Teval's Judgment
13%inclusion22 decks163 decks
13%synergy
Out of the Tombs
13%inclusion48 decks366 decks
13%synergy
Funeral Room // Awakening Hall
13%inclusion48 decks366 decks
12%synergy
Nowhere to Run
13%inclusion47 decks366 decks
12%synergy
Battles
Invasion of Theros
10%inclusion36 decks366 decks
8%synergy
Utility Lands
Hall of Heliod's Generosity
60%inclusion220 decks366 decks
47%synergy
Bojuka Bog
49%inclusion178 decks366 decks
21%synergy
Halimar Depths
20%inclusion74 decks366 decks
15%synergy
Reliquary Tower
11%inclusion39 decks366 decks
-23%synergy
Cephalid Coliseum
7.9%inclusion29 decks366 decks
4%synergy
Takenuma, Abandoned Mire
6.3%inclusion23 decks366 decks
0%synergy
Adagia, Windswept Bastion
6.1%inclusion6 decks98 decks
4%synergy
Nephalia Drownyard
6.0%inclusion22 decks366 decks
5%synergy
Otawara, Soaring City
5.7%inclusion21 decks366 decks
-13%synergy
Mana Artifacts
Arcane Signet
89%inclusion324 decks366 decks
1%synergy
Sol Ring
81%inclusion298 decks366 decks
-9%synergy
Azorius Signet
56%inclusion206 decks366 decks
23%synergy
Orzhov Signet
53%inclusion194 decks366 decks
18%synergy
Talisman of Dominance
43%inclusion157 decks366 decks
-6%synergy
Talisman of Progress
40%inclusion148 decks366 decks
-2%synergy
Talisman of Hierarchy
36%inclusion132 decks366 decks
-7%synergy
Dimir Signet
36%inclusion130 decks366 decks
3%synergy
Mind Stone
25%inclusion93 decks366 decks
12%synergy
Fellwar Stone
25%inclusion91 decks366 decks
-9%synergy
Commander's Sphere
24%inclusion89 decks366 decks
5%synergy
Chromatic Lantern
7.9%inclusion29 decks366 decks
-6%synergy
Lands
Island
99%inclusion361 decks366 decks
6%synergy
Plains
98%inclusion357 decks366 decks
6%synergy
Swamp
97%inclusion354 decks366 decks
6%synergy
Command Tower
94%inclusion344 decks366 decks
2%synergy
Arcane Sanctum
72%inclusion265 decks366 decks
18%synergy
Adarkar Wastes
64%inclusion233 decks366 decks
33%synergy
Caves of Koilos
63%inclusion231 decks366 decks
28%synergy
Underground River
55%inclusion201 decks366 decks
23%synergy
Exotic Orchard
49%inclusion178 decks366 decks
-10%synergy
Obscura Storefront
46%inclusion169 decks366 decks
36%synergy
Terramorphic Expanse
45%inclusion163 decks366 decks
27%synergy
Evolving Wilds
44%inclusion161 decks366 decks
19%synergy
Temple of Enlightenment
42%inclusion155 decks366 decks
25%synergy
Temple of Silence
42%inclusion153 decks366 decks
22%synergy
Temple of Deceit
41%inclusion151 decks366 decks
23%synergy
Dimir Aqueduct
40%inclusion146 decks366 decks
26%synergy
Azorius Chancery
39%inclusion143 decks366 decks
24%synergy
Prairie Stream
39%inclusion141 decks366 decks
-2%synergy
Glacial Fortress
36%inclusion133 decks366 decks
-3%synergy
Orzhov Basilica
36%inclusion130 decks366 decks
19%synergy
Contaminated Landscape
35%inclusion129 decks366 decks
21%synergy
Tainted Field
35%inclusion129 decks366 decks
28%synergy
Isolated Chapel
35%inclusion127 decks366 decks
-3%synergy
Sunken Hollow
34%inclusion123 decks366 decks
-6%synergy
Tainted Isle
33%inclusion121 decks366 decks
27%synergy
Valgavoth's Lair
33%inclusion119 decks366 decks
30%synergy
Drowned Catacomb
31%inclusion115 decks366 decks
-4%synergy
Ash Barrens
29%inclusion105 decks366 decks
18%synergy
Godless Shrine
25%inclusion90 decks366 decks
-25%synergy
Raffine's Tower
24%inclusion88 decks366 decks
-17%synergy
Watery Grave
23%inclusion85 decks366 decks
-26%synergy
Hallowed Fountain
22%inclusion82 decks366 decks
-27%synergy
Flooded Strand
20%inclusion72 decks366 decks
-18%synergy
Shadowy Backstreet
19%inclusion69 decks366 decks
7%synergy
Meticulous Archive
19%inclusion68 decks366 decks
5%synergy
Sea of Clouds
19%inclusion68 decks366 decks
-17%synergy
Polluted Delta
18%inclusion67 decks366 decks
-19%synergy
Undercity Sewers
17%inclusion64 decks366 decks
3%synergy
Vault of Champions
17%inclusion62 decks366 decks
-16%synergy
Marsh Flats
17%inclusion61 decks366 decks
-19%synergy
Floodfarm Verge
16%inclusion60 decks366 decks
5%synergy
Gloomlake Verge
16%inclusion57 decks366 decks
5%synergy
Thriving Isle
15%inclusion55 decks366 decks
10%synergy
Shipwreck Marsh
15%inclusion55 decks366 decks
-6%synergy
Morphic Pool
15%inclusion54 decks366 decks
-20%synergy
Thriving Moor
15%inclusion54 decks366 decks
10%synergy
Skycloud Expanse
14%inclusion53 decks366 decks
0%synergy
Thriving Heath
14%inclusion53 decks366 decks
10%synergy
Deserted Beach
14%inclusion50 decks366 decks
-7%synergy
Darkwater Catacombs
13%inclusion49 decks366 decks
-1%synergy
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