The Master of Keys (Commander) - Optimized Control

The Master of Keys
Rank #303
31decks
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Harvey McGuinness
Sep 23, 2025
Harvey McGuinness
What if Thassa's Oracle Were Banned?
What would happen to cEDH if Thassa's Oracle were banned tomorrow? Would the best decks fall apart? Would there be a new meta? Let's discuss.
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Utility Lands
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Ripples of Undeath
77%inclusion24 decks31 decks
75%synergy
Animate Dead
84%inclusion26 decks31 decks
74%synergy
Necromancy
77%inclusion24 decks31 decks
73%synergy
Mystic Remora
84%inclusion26 decks31 decks
63%synergy
Dress Down
65%inclusion20 decks31 decks
62%synergy
Entity Tracker
68%inclusion21 decks31 decks
62%synergy
Inquisitive Glimmer
65%inclusion20 decks31 decks
57%synergy
Amphibian Downpour
58%inclusion18 decks31 decks
53%synergy
Abdel Adrian, Gorion's Ward
55%inclusion17 decks31 decks
53%synergy
Entomb
55%inclusion17 decks31 decks
48%synergy
Top Cards
Swords to Plowshares
71%inclusion22 decks31 decks
3%synergy
Sevinne's Reclamation
55%inclusion17 decks31 decks
46%synergy
An Offer You Can't Refuse
55%inclusion17 decks31 decks
27%synergy
Blind Obedience
48%inclusion15 decks31 decks
37%synergy
Esper Sentinel
48%inclusion15 decks31 decks
21%synergy
Seal of Cleansing
48%inclusion15 decks31 decks
47%synergy
Scrabbling Skullcrab
45%inclusion14 decks31 decks
44%synergy
Dance of the Dead
45%inclusion14 decks31 decks
43%synergy
Dovin's Veto
45%inclusion14 decks31 decks
19%synergy
Swan Song
45%inclusion14 decks31 decks
25%synergy
Game Changers
Smothering Tithe
74%inclusion23 decks31 decks
44%synergy
Rhystic Study
68%inclusion21 decks31 decks
37%synergy
Enlightened Tutor
61%inclusion19 decks31 decks
43%synergy
Demonic Tutor
48%inclusion15 decks31 decks
28%synergy
Ancient Tomb
42%inclusion13 decks31 decks
30%synergy
Necropotence
39%inclusion12 decks31 decks
32%synergy
Fierce Guardianship
39%inclusion12 decks31 decks
18%synergy
Force of Will
35%inclusion11 decks31 decks
23%synergy
Cyclonic Rift
35%inclusion11 decks31 decks
13%synergy
Vampiric Tutor
35%inclusion11 decks31 decks
19%synergy
Creatures
Gravebreaker Lamia
42%inclusion13 decks31 decks
41%synergy
Demon of Fate's Design
42%inclusion13 decks31 decks
37%synergy
Fear of Impostors
42%inclusion13 decks31 decks
41%synergy
Overlord of the Balemurk
42%inclusion13 decks31 decks
40%synergy
Starfield Mystic
39%inclusion12 decks31 decks
32%synergy
Mesa Enchantress
39%inclusion12 decks31 decks
30%synergy
Ledger Shredder
39%inclusion12 decks31 decks
30%synergy
Zur, Eternal Schemer
35%inclusion11 decks31 decks
32%synergy
Lotho, Corrupt Shirriff
32%inclusion10 decks31 decks
15%synergy
Thassa's Oracle
32%inclusion10 decks31 decks
23%synergy
Overlord of the Floodpits
32%inclusion10 decks31 decks
29%synergy
Victor, Valgavoth's Seneschal
29%inclusion9 decks31 decks
27%synergy
Enduring Curiosity
26%inclusion8 decks31 decks
18%synergy
Fear of Sleep Paralysis
26%inclusion8 decks31 decks
21%synergy
Orcish Bowmasters
26%inclusion8 decks31 decks
16%synergy
Displacer Kitten
23%inclusion7 decks31 decks
16%synergy
Doomwake Giant
23%inclusion7 decks31 decks
17%synergy
Grand Abolisher
23%inclusion7 decks31 decks
8%synergy
Hullbreaker Horror
23%inclusion7 decks31 decks
17%synergy
Faerie Mastermind
19%inclusion6 decks31 decks
10%synergy
Heliod, the Radiant Dawn
19%inclusion6 decks31 decks
16%synergy
Lurrus of the Dream-Den
16%inclusion5 decks31 decks
15%synergy
Valley Floodcaller
16%inclusion5 decks31 decks
12%synergy
Aminatou, Veil Piercer
16%inclusion5 decks31 decks
15%synergy
Psychic Frog
16%inclusion5 decks31 decks
9%synergy
Ghostly Pilferer
16%inclusion5 decks31 decks
9%synergy
Witch Enchanter
13%inclusion4 decks31 decks
6%synergy
Opposition Agent
13%inclusion4 decks31 decks
5%synergy
Archon of Sun's Grace
13%inclusion4 decks31 decks
9%synergy
Heliod, Sun-Crowned
13%inclusion4 decks31 decks
9%synergy
Silent Hallcreeper
13%inclusion4 decks31 decks
8%synergy
Hedron Crab
13%inclusion4 decks31 decks
12%synergy
Leonin Relic-Warder
13%inclusion4 decks31 decks
13%synergy
Spirited Companion
13%inclusion4 decks31 decks
11%synergy
Talion, the Kindly Lord
13%inclusion4 decks31 decks
6%synergy
Drannith Magistrate
13%inclusion4 decks31 decks
5%synergy
Grim Guardian
13%inclusion4 decks31 decks
10%synergy
Alseid of Life's Bounty
13%inclusion4 decks31 decks
12%synergy
Wan Shi Tong, Librarian
13%inclusion2 decks16 decks
8%synergy
Exhibition Tidecaller
13%inclusion1 decks8 decks
12%synergy
Hoarding Broodlord
10%inclusion3 decks31 decks
8%synergy
Walking Ballista
10%inclusion3 decks31 decks
7%synergy
Soaring Lightbringer
10%inclusion3 decks31 decks
5%synergy
Laboratory Maniac
10%inclusion3 decks31 decks
6%synergy
Mockingbird
10%inclusion3 decks31 decks
5%synergy
Ghostly Dancers
10%inclusion3 decks31 decks
7%synergy
Ondu Spiritdancer
10%inclusion3 decks31 decks
4%synergy
Zur the Enchanter
10%inclusion3 decks31 decks
5%synergy
Dauthi Voidwalker
10%inclusion3 decks31 decks
4%synergy
Mindwrack Harpy
10%inclusion3 decks31 decks
9%synergy
Instants
Dark Ritual
42%inclusion13 decks31 decks
22%synergy
Mana Drain
39%inclusion12 decks31 decks
21%synergy
Frantic Search
32%inclusion10 decks31 decks
14%synergy
Path to Exile
32%inclusion10 decks31 decks
-10%synergy
Gifts Ungiven
29%inclusion9 decks31 decks
26%synergy
Force of Negation
29%inclusion9 decks31 decks
17%synergy
Sink into Stupor
29%inclusion9 decks31 decks
16%synergy
Mystical Tutor
26%inclusion8 decks31 decks
15%synergy
Void Rend
23%inclusion7 decks31 decks
-12%synergy
Silence
23%inclusion7 decks31 decks
13%synergy
Teferi's Protection
19%inclusion6 decks31 decks
3%synergy
Intuition
19%inclusion6 decks31 decks
18%synergy
Borne Upon a Wind
19%inclusion6 decks31 decks
15%synergy
Fell the Profane
16%inclusion5 decks31 decks
7%synergy
Muddle the Mixture
16%inclusion5 decks31 decks
13%synergy
Cabal Ritual
16%inclusion5 decks31 decks
13%synergy
Demonic Consultation
16%inclusion5 decks31 decks
8%synergy
Arcane Denial
16%inclusion5 decks31 decks
-4%synergy
Counterspell
16%inclusion5 decks31 decks
-26%synergy
Tainted Pact
13%inclusion4 decks31 decks
6%synergy
Negate
13%inclusion4 decks31 decks
-3%synergy
Brainstorm
13%inclusion4 decks31 decks
-4%synergy
Generous Gift
13%inclusion4 decks31 decks
-1%synergy
Deadly Rollick
10%inclusion3 decks31 decks
-6%synergy
Sacrifice
10%inclusion3 decks31 decks
9%synergy
Mental Misstep
10%inclusion3 decks31 decks
3%synergy
Retraction Helix
10%inclusion3 decks31 decks
9%synergy
Culling the Weak
10%inclusion3 decks31 decks
8%synergy
Thirst for Meaning
10%inclusion3 decks31 decks
8%synergy
Flusterstorm
10%inclusion3 decks31 decks
2%synergy
Into the Flood Maw
10%inclusion3 decks31 decks
6%synergy
Faithful Mending
10%inclusion3 decks31 decks
6%synergy
Waterlogged Teachings
10%inclusion3 decks31 decks
5%synergy
Drown in the Loch
6.5%inclusion2 decks31 decks
5%synergy
Shred Memory
6.5%inclusion2 decks31 decks
6%synergy
Chain of Vapor
6.5%inclusion2 decks31 decks
4%synergy
Dawn's Truce
6.5%inclusion2 decks31 decks
2%synergy
Lim-Dûl's Vault
6.5%inclusion2 decks31 decks
3%synergy
Razorgrass Ambush
6.5%inclusion2 decks31 decks
5%synergy
Darkblast
6.5%inclusion2 decks31 decks
6%synergy
Angel's Grace
6.5%inclusion2 decks31 decks
4%synergy
Prismatic Strands
6.5%inclusion2 decks31 decks
6%synergy
Ad Nauseam
6.5%inclusion2 decks31 decks
4%synergy
Delay
6.5%inclusion2 decks31 decks
5%synergy
Anguished Unmaking
6.5%inclusion2 decks31 decks
-19%synergy
Mana Leak
6.5%inclusion2 decks31 decks
5%synergy
No More Lies
6.5%inclusion2 decks31 decks
5%synergy
Saw in Half
6.5%inclusion2 decks31 decks
4%synergy
Sorceries
Windfall
42%inclusion13 decks31 decks
29%synergy
Toxic Deluge
35%inclusion11 decks31 decks
16%synergy
Supreme Verdict
19%inclusion6 decks31 decks
5%synergy
Demonic Counsel
19%inclusion6 decks31 decks
18%synergy
Buried Alive
19%inclusion6 decks31 decks
15%synergy
Reanimate
19%inclusion6 decks31 decks
3%synergy
Replenish
16%inclusion5 decks31 decks
14%synergy
Glimpse the Unthinkable
16%inclusion5 decks31 decks
16%synergy
Lively Dirge
13%inclusion4 decks31 decks
12%synergy
Damn
13%inclusion4 decks31 decks
-7%synergy
Extinguish All Hope
13%inclusion4 decks31 decks
11%synergy
Dance of the Manse
13%inclusion4 decks31 decks
10%synergy
Resurgent Belief
10%inclusion3 decks31 decks
8%synergy
Imperial Seal
10%inclusion3 decks31 decks
3%synergy
Yawgmoth's Will
10%inclusion3 decks31 decks
8%synergy
Traumatize
10%inclusion3 decks31 decks
9%synergy
Grim Tutor
10%inclusion3 decks31 decks
5%synergy
Space-Time Anomaly
10%inclusion2 decks21 decks
8%synergy
Unmarked Grave
6.5%inclusion2 decks31 decks
5%synergy
Open the Vaults
6.5%inclusion2 decks31 decks
5%synergy
Peer into the Abyss
6.5%inclusion2 decks31 decks
4%synergy
Wrath of God
6.5%inclusion2 decks31 decks
3%synergy
Farewell
6.5%inclusion2 decks31 decks
-6%synergy
Idyllic Tutor
6.5%inclusion2 decks31 decks
2%synergy
Rite of Oblivion
6.5%inclusion2 decks31 decks
6%synergy
Final Parting
6.5%inclusion2 decks31 decks
6%synergy
Mnemonic Betrayal
6.5%inclusion2 decks31 decks
4%synergy
Beseech the Mirror
6.5%inclusion2 decks31 decks
3%synergy
Maddening Cacophony
6.5%inclusion2 decks31 decks
5%synergy
Redress Fate
6.5%inclusion2 decks31 decks
1%synergy
Utility Artifacts
Mesmeric Orb
42%inclusion13 decks31 decks
41%synergy
The One Ring
26%inclusion8 decks31 decks
13%synergy
Wishclaw Talisman
23%inclusion7 decks31 decks
15%synergy
Cloud Key
10%inclusion3 decks31 decks
6%synergy
Lightning Greaves
10%inclusion3 decks31 decks
-13%synergy
Expedition Map
6.5%inclusion2 decks31 decks
5%synergy
Isochron Scepter
6.5%inclusion2 decks31 decks
4%synergy
Enchantments
Ghostly Prison
45%inclusion14 decks31 decks
22%synergy
The Meathook Massacre
42%inclusion13 decks31 decks
39%synergy
Grasp of Fate
42%inclusion13 decks31 decks
36%synergy
Propaganda
39%inclusion12 decks31 decks
10%synergy
Touch the Spirit Realm
35%inclusion11 decks31 decks
33%synergy
Cemetery Tampering
32%inclusion10 decks31 decks
31%synergy
Tinybones Joins Up
29%inclusion9 decks31 decks
28%synergy
Mirrormade
29%inclusion9 decks31 decks
19%synergy
Seal of Removal
29%inclusion9 decks31 decks
28%synergy
Starfield of Nyx
26%inclusion8 decks31 decks
22%synergy
Sphere of Safety
26%inclusion8 decks31 decks
16%synergy
Static Prison
26%inclusion8 decks31 decks
25%synergy
Secret Arcade // Dusty Parlor
26%inclusion8 decks31 decks
21%synergy
Land Tax
26%inclusion8 decks31 decks
20%synergy
Darksteel Mutation
23%inclusion7 decks31 decks
17%synergy
Out of the Tombs
23%inclusion7 decks31 decks
22%synergy
Authority of the Consuls
23%inclusion7 decks31 decks
9%synergy
Estrid's Invocation
23%inclusion7 decks31 decks
18%synergy
Greater Auramancy
23%inclusion7 decks31 decks
18%synergy
Aura of Silence
23%inclusion7 decks31 decks
19%synergy
The Tale of Tamiyo
19%inclusion6 decks31 decks
19%synergy
Sheltered by Ghosts
19%inclusion6 decks31 decks
17%synergy
Cacophony Unleashed
16%inclusion5 decks31 decks
14%synergy
Chronic Flooding
16%inclusion5 decks31 decks
16%synergy
Black Market Connections
16%inclusion5 decks31 decks
1%synergy
Nowhere to Run
16%inclusion5 decks31 decks
15%synergy
Founding the Third Path
13%inclusion4 decks31 decks
13%synergy
Court of Cunning
13%inclusion4 decks31 decks
12%synergy
Out of Time
13%inclusion4 decks31 decks
12%synergy
Copy Enchantment
13%inclusion4 decks31 decks
8%synergy
Karmic Justice
13%inclusion4 decks31 decks
11%synergy
Phyrexian Arena
13%inclusion4 decks31 decks
-1%synergy
Trouble in Pairs
13%inclusion4 decks31 decks
8%synergy
Standstill
13%inclusion4 decks31 decks
13%synergy
Parallax Wave
10%inclusion3 decks31 decks
9%synergy
Sigil of the Empty Throne
10%inclusion3 decks31 decks
4%synergy
Attunement
10%inclusion3 decks31 decks
9%synergy
Exquisite Blood
10%inclusion3 decks31 decks
3%synergy
All That Glitters
10%inclusion3 decks31 decks
1%synergy
Eaten by Piranhas
10%inclusion3 decks31 decks
9%synergy
Enchanted Evening
10%inclusion3 decks31 decks
8%synergy
Oubliette
10%inclusion3 decks31 decks
8%synergy
Solitary Confinement
10%inclusion3 decks31 decks
8%synergy
Bloodchief Ascension
10%inclusion3 decks31 decks
4%synergy
Ethereal Armor
10%inclusion3 decks31 decks
5%synergy
Dog Umbra
10%inclusion3 decks31 decks
9%synergy
Stillness in Motion
7.4%inclusion2 decks27 decks
7%synergy
Mornsong Aria
7.1%inclusion1 decks14 decks
7%synergy
Endless Evil
6.5%inclusion2 decks31 decks
6%synergy
Stony Silence
6.5%inclusion2 decks31 decks
6%synergy
Planeswalkers
Teferi, Time Raveler
26%inclusion8 decks31 decks
18%synergy
Narset, Parter of Veils
6.5%inclusion2 decks31 decks
3%synergy
Utility Lands
Hall of Heliod's Generosity
45%inclusion14 decks31 decks
32%synergy
Otawara, Soaring City
39%inclusion12 decks31 decks
20%synergy
Cephalid Coliseum
35%inclusion11 decks31 decks
32%synergy
Takenuma, Abandoned Mire
29%inclusion9 decks31 decks
23%synergy
Bojuka Bog
26%inclusion8 decks31 decks
-1%synergy
Serra's Sanctum
23%inclusion7 decks31 decks
21%synergy
Urza's Saga
23%inclusion7 decks31 decks
11%synergy
Eiganjo, Seat of the Empire
13%inclusion4 decks31 decks
8%synergy
Urborg, Tomb of Yawgmoth
13%inclusion4 decks31 decks
-0%synergy
Volrath's Stronghold
10%inclusion3 decks31 decks
9%synergy
Emergence Zone
10%inclusion3 decks31 decks
8%synergy
Reliquary Tower
10%inclusion3 decks31 decks
-24%synergy
Phyrexian Tower
6.5%inclusion2 decks31 decks
3%synergy
Command Beacon
6.5%inclusion2 decks31 decks
4%synergy
Rogue's Passage
6.5%inclusion2 decks31 decks
-3%synergy
Mana Artifacts
Sol Ring
97%inclusion30 decks31 decks
7%synergy
Arcane Signet
81%inclusion25 decks31 decks
-7%synergy
Talisman of Dominance
74%inclusion23 decks31 decks
24%synergy
Talisman of Progress
71%inclusion22 decks31 decks
27%synergy
Talisman of Hierarchy
68%inclusion21 decks31 decks
23%synergy
Fellwar Stone
48%inclusion15 decks31 decks
15%synergy
Chrome Mox
26%inclusion8 decks31 decks
17%synergy
Mana Vault
23%inclusion7 decks31 decks
14%synergy
Dimir Signet
19%inclusion6 decks31 decks
-11%synergy
Azorius Signet
19%inclusion6 decks31 decks
-10%synergy
Lotus Petal
16%inclusion5 decks31 decks
6%synergy
Mox Opal
16%inclusion5 decks31 decks
8%synergy
Orzhov Signet
16%inclusion5 decks31 decks
-15%synergy
Mox Amber
10%inclusion3 decks31 decks
4%synergy
Basalt Monolith
6.5%inclusion2 decks31 decks
4%synergy
Thought Vessel
6.5%inclusion2 decks31 decks
-19%synergy
Hourglass of the Lost
6.5%inclusion2 decks31 decks
6%synergy
Lands
Command Tower
97%inclusion30 decks31 decks
4%synergy
Swamp
94%inclusion29 decks31 decks
2%synergy
Island
94%inclusion29 decks31 decks
0%synergy
Plains
94%inclusion29 decks31 decks
2%synergy
Watery Grave
90%inclusion28 decks31 decks
39%synergy
Godless Shrine
84%inclusion26 decks31 decks
32%synergy
Hallowed Fountain
84%inclusion26 decks31 decks
33%synergy
Polluted Delta
71%inclusion22 decks31 decks
33%synergy
Flooded Strand
68%inclusion21 decks31 decks
29%synergy
Marsh Flats
65%inclusion20 decks31 decks
29%synergy
Sea of Clouds
61%inclusion19 decks31 decks
27%synergy
Raffine's Tower
58%inclusion18 decks31 decks
17%synergy
Morphic Pool
58%inclusion18 decks31 decks
25%synergy
Adarkar Wastes
55%inclusion17 decks31 decks
22%synergy
Vault of Champions
55%inclusion17 decks31 decks
23%synergy
Exotic Orchard
52%inclusion16 decks31 decks
-7%synergy
Caves of Koilos
52%inclusion16 decks31 decks
16%synergy
Underground River
45%inclusion14 decks31 decks
10%synergy
Glacial Fortress
42%inclusion13 decks31 decks
-1%synergy
Shadowy Backstreet
42%inclusion13 decks31 decks
29%synergy
Isolated Chapel
39%inclusion12 decks31 decks
-3%synergy
Undercity Sewers
35%inclusion11 decks31 decks
21%synergy
Meticulous Archive
35%inclusion11 decks31 decks
21%synergy
Windswept Heath
32%inclusion10 decks31 decks
23%synergy
Verdant Catacombs
32%inclusion10 decks31 decks
23%synergy
Reflecting Pool
32%inclusion10 decks31 decks
24%synergy
Mana Confluence
32%inclusion10 decks31 decks
19%synergy
Gloomlake Verge
32%inclusion10 decks31 decks
21%synergy
Bloodstained Mire
32%inclusion10 decks31 decks
22%synergy
Drowned Catacomb
29%inclusion9 decks31 decks
-9%synergy
Sink into Stupor
29%inclusion9 decks31 decks
16%synergy
Arid Mesa
29%inclusion9 decks31 decks
20%synergy
Misty Rainforest
26%inclusion8 decks31 decks
15%synergy
Valgavoth's Lair
26%inclusion8 decks31 decks
23%synergy
Arcane Sanctum
26%inclusion8 decks31 decks
-28%synergy
Deserted Beach
26%inclusion8 decks31 decks
5%synergy
Floodfarm Verge
26%inclusion8 decks31 decks
15%synergy
City of Brass
26%inclusion8 decks31 decks
11%synergy
Tundra
23%inclusion7 decks31 decks
7%synergy
Prairie Stream
23%inclusion7 decks31 decks
-18%synergy
Shattered Sanctum
23%inclusion7 decks31 decks
5%synergy
Scalding Tarn
23%inclusion7 decks31 decks
12%synergy
Brightclimb Pathway
19%inclusion6 decks31 decks
13%synergy
Bleachbone Verge
19%inclusion6 decks31 decks
11%synergy
Underground Sea
19%inclusion6 decks31 decks
4%synergy
Shipwreck Marsh
19%inclusion6 decks31 decks
-1%synergy
Scrubland
19%inclusion6 decks31 decks
3%synergy
Prismatic Vista
16%inclusion5 decks31 decks
12%synergy
Fell the Profane
16%inclusion5 decks31 decks
7%synergy
Fabled Passage
16%inclusion5 decks31 decks
8%synergy
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