The Master of Keys (Commander) - Upgraded Control

The Master of Keys
Rank #300
46decks
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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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Sorceries
Utility Artifacts
Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Changing Loyalty
17%inclusion2 decks12 decks
16%synergy
Primary Research
8.3%inclusion1 decks12 decks
8%synergy
Paramecia Coloniex
4.8%inclusion1 decks21 decks
5%synergy
Dream Beavers
4.8%inclusion1 decks21 decks
4%synergy
High Synergy Cards
Ripples of Undeath
78%inclusion36 decks46 decks
76%synergy
Inquisitive Glimmer
80%inclusion37 decks46 decks
73%synergy
Entity Tracker
76%inclusion35 decks46 decks
70%synergy
Gravebreaker Lamia
67%inclusion31 decks46 decks
66%synergy
Starfield Mystic
72%inclusion33 decks46 decks
65%synergy
Animate Dead
72%inclusion33 decks46 decks
62%synergy
Dress Down
63%inclusion29 decks46 decks
61%synergy
Amphibian Downpour
65%inclusion30 decks46 decks
61%synergy
Scrabbling Skullcrab
59%inclusion27 decks46 decks
58%synergy
Fear of Impostors
59%inclusion27 decks46 decks
57%synergy
Top Cards
Mystic Remora
65%inclusion30 decks46 decks
45%synergy
Demon of Fate's Design
61%inclusion28 decks46 decks
55%synergy
Mesa Enchantress
61%inclusion28 decks46 decks
52%synergy
Necromancy
59%inclusion27 decks46 decks
54%synergy
Doomwake Giant
59%inclusion27 decks46 decks
53%synergy
Swords to Plowshares
52%inclusion24 decks46 decks
-16%synergy
Grasp of Fate
50%inclusion23 decks46 decks
44%synergy
Sevinne's Reclamation
48%inclusion22 decks46 decks
39%synergy
Mirrormade
48%inclusion22 decks46 decks
38%synergy
Estrid's Invocation
48%inclusion22 decks46 decks
43%synergy
Game Changers
Smothering Tithe
39%inclusion18 decks46 decks
8%synergy
Rhystic Study
28%inclusion13 decks46 decks
-3%synergy
Farewell
13%inclusion6 decks46 decks
1%synergy
Gifts Ungiven
13%inclusion6 decks46 decks
11%synergy
Enlightened Tutor
8.7%inclusion4 decks46 decks
-10%synergy
Consecrated Sphinx
6.5%inclusion3 decks46 decks
0%synergy
Serra's Sanctum
6.5%inclusion3 decks46 decks
5%synergy
Demonic Tutor
6.5%inclusion3 decks46 decks
-14%synergy
Creatures
Overlord of the Floodpits
46%inclusion21 decks46 decks
42%synergy
Fear of Sleep Paralysis
46%inclusion21 decks46 decks
41%synergy
Overlord of the Balemurk
43%inclusion20 decks46 decks
42%synergy
Zur, Eternal Schemer
43%inclusion20 decks46 decks
40%synergy
Ondu Spiritdancer
39%inclusion18 decks46 decks
33%synergy
Victor, Valgavoth's Seneschal
33%inclusion15 decks46 decks
31%synergy
Heliod, the Radiant Dawn
33%inclusion15 decks46 decks
29%synergy
Silent Hallcreeper
28%inclusion13 decks46 decks
24%synergy
Grim Guardian
28%inclusion13 decks46 decks
26%synergy
Ghostly Dancers
26%inclusion12 decks46 decks
24%synergy
Sage of Mysteries
24%inclusion11 decks46 decks
24%synergy
Zur the Enchanter
24%inclusion11 decks46 decks
19%synergy
Archon of Sun's Grace
22%inclusion10 decks46 decks
17%synergy
Abdel Adrian, Gorion's Ward
22%inclusion10 decks46 decks
20%synergy
Stenn, Paranoid Partisan
17%inclusion8 decks46 decks
16%synergy
Balemurk Leech
17%inclusion8 decks46 decks
17%synergy
Ancient Cellarspawn
15%inclusion7 decks46 decks
12%synergy
Hullbreaker Horror
15%inclusion7 decks46 decks
9%synergy
Ledger Shredder
15%inclusion7 decks46 decks
7%synergy
Lotho, Corrupt Shirriff
13%inclusion6 decks46 decks
-4%synergy
Enduring Curiosity
13%inclusion6 decks46 decks
5%synergy
Witch Enchanter
11%inclusion5 decks46 decks
4%synergy
Valley Floodcaller
11%inclusion5 decks46 decks
7%synergy
Hedron Crab
11%inclusion5 decks46 decks
10%synergy
Overlord of the Mistmoors
11%inclusion5 decks46 decks
9%synergy
Moon-Blessed Cleric
11%inclusion5 decks46 decks
6%synergy
Nashi, Searcher in the Dark
11%inclusion5 decks46 decks
10%synergy
Aminatou, Veil Piercer
11%inclusion5 decks46 decks
10%synergy
Mindwrack Harpy
11%inclusion5 decks46 decks
11%synergy
Lurrus of the Dream-Den
8.7%inclusion4 decks46 decks
7%synergy
Doom Whisperer
8.7%inclusion4 decks46 decks
7%synergy
Esper Sentinel
8.7%inclusion4 decks46 decks
-19%synergy
Soaring Lightbringer
8.7%inclusion4 decks46 decks
4%synergy
Angel of Suffering
8.7%inclusion4 decks46 decks
9%synergy
Skullsnap Nuisance
8.7%inclusion4 decks46 decks
8%synergy
Alseid of Life's Bounty
8.7%inclusion4 decks46 decks
7%synergy
Summon: Bahamut
7.3%inclusion3 decks41 decks
6%synergy
Starnheim Courser
6.5%inclusion3 decks46 decks
3%synergy
Fear of Infinity
6.5%inclusion3 decks46 decks
6%synergy
High Fae Trickster
6.5%inclusion3 decks46 decks
2%synergy
Hydroelectric Specimen
6.5%inclusion3 decks46 decks
4%synergy
Boggart Trawler
6.5%inclusion3 decks46 decks
3%synergy
Leonin Relic-Warder
6.5%inclusion3 decks46 decks
6%synergy
Athreos, Shroud-Veiled
6.5%inclusion3 decks46 decks
2%synergy
Archetype of Imagination
6.5%inclusion3 decks46 decks
2%synergy
Laboratory Maniac
6.5%inclusion3 decks46 decks
3%synergy
Neerdiv, Devious Diver
6.5%inclusion3 decks46 decks
6%synergy
Nezahal, Primal Tide
6.5%inclusion3 decks46 decks
3%synergy
Toxrill, the Corrosive
6.5%inclusion3 decks46 decks
4%synergy
Valgavoth, Terror Eater
6.5%inclusion3 decks46 decks
3%synergy
Instants
An Offer You Can't Refuse
43%inclusion20 decks46 decks
16%synergy
Arcane Denial
39%inclusion18 decks46 decks
19%synergy
Entomb
35%inclusion16 decks46 decks
28%synergy
Counterspell
35%inclusion16 decks46 decks
-7%synergy
Swan Song
28%inclusion13 decks46 decks
8%synergy
Dovin's Veto
26%inclusion12 decks46 decks
0%synergy
Void Rend
22%inclusion10 decks46 decks
-13%synergy
Sink into Stupor
22%inclusion10 decks46 decks
9%synergy
Mana Drain
20%inclusion9 decks46 decks
2%synergy
Path to Exile
20%inclusion9 decks46 decks
-23%synergy
Negate
17%inclusion8 decks46 decks
1%synergy
Dark Ritual
15%inclusion7 decks46 decks
-5%synergy
Inkshield
15%inclusion7 decks46 decks
6%synergy
Fell the Profane
13%inclusion6 decks46 decks
4%synergy
Thirst for Meaning
13%inclusion6 decks46 decks
12%synergy
Generous Gift
11%inclusion5 decks46 decks
-3%synergy
Fact or Fiction
8.7%inclusion4 decks46 decks
5%synergy
Anguished Unmaking
8.7%inclusion4 decks46 decks
-17%synergy
Otherworldly Gaze
8.7%inclusion4 decks46 decks
7%synergy
Frantic Search
6.5%inclusion3 decks46 decks
-12%synergy
Brainstorm
6.5%inclusion3 decks46 decks
-10%synergy
Strix Serenade
6.5%inclusion3 decks46 decks
3%synergy
Disallow
6.5%inclusion3 decks46 decks
3%synergy
Faithful Mending
6.5%inclusion3 decks46 decks
3%synergy
Sorceries
Glimpse the Unthinkable
20%inclusion9 decks46 decks
19%synergy
Redress Fate
20%inclusion9 decks46 decks
14%synergy
Singularity Rupture
18%inclusion7 decks39 decks
16%synergy
Windfall
17%inclusion8 decks46 decks
4%synergy
Extinguish All Hope
17%inclusion8 decks46 decks
16%synergy
Dance of the Manse
17%inclusion8 decks46 decks
14%synergy
Supreme Verdict
15%inclusion7 decks46 decks
0%synergy
Resurgent Belief
13%inclusion6 decks46 decks
11%synergy
Wrath of God
13%inclusion6 decks46 decks
9%synergy
Idyllic Tutor
13%inclusion6 decks46 decks
9%synergy
Reanimate
13%inclusion6 decks46 decks
-3%synergy
Toxic Deluge
13%inclusion6 decks46 decks
-7%synergy
Austere Command
11%inclusion5 decks46 decks
2%synergy
Time Wipe
11%inclusion5 decks46 decks
4%synergy
Damn
11%inclusion5 decks46 decks
-9%synergy
Space-Time Anomaly
10%inclusion4 decks39 decks
9%synergy
Buried Alive
8.7%inclusion4 decks46 decks
5%synergy
Traumatize
8.7%inclusion4 decks46 decks
8%synergy
Ponder
6.5%inclusion3 decks46 decks
-2%synergy
Open the Vaults
6.5%inclusion3 decks46 decks
5%synergy
Replenish
6.5%inclusion3 decks46 decks
5%synergy
Cut Your Losses
6.5%inclusion3 decks46 decks
6%synergy
Demonic Counsel
6.5%inclusion3 decks46 decks
6%synergy
Breach the Multiverse
6.5%inclusion3 decks46 decks
5%synergy
Utility Artifacts
Mesmeric Orb
35%inclusion16 decks46 decks
34%synergy
Lightning Greaves
22%inclusion10 decks46 decks
-1%synergy
Swiftfoot Boots
11%inclusion5 decks46 decks
-13%synergy
Cloud Key
8.7%inclusion4 decks46 decks
5%synergy
Crucible of Worlds
8.7%inclusion4 decks46 decks
8%synergy
Perpetual Timepiece
6.5%inclusion3 decks46 decks
6%synergy
Whip of Erebos
6.5%inclusion3 decks46 decks
4%synergy
Palantír of Orthanc
6.5%inclusion3 decks46 decks
5%synergy
Enchantments
Blind Obedience
46%inclusion21 decks46 decks
34%synergy
Sphere of Safety
46%inclusion21 decks46 decks
36%synergy
Ghostly Prison
46%inclusion21 decks46 decks
23%synergy
Dance of the Dead
43%inclusion20 decks46 decks
41%synergy
Secret Arcade // Dusty Parlor
43%inclusion20 decks46 decks
39%synergy
Cemetery Tampering
41%inclusion19 decks46 decks
41%synergy
Seal of Cleansing
39%inclusion18 decks46 decks
38%synergy
Propaganda
39%inclusion18 decks46 decks
11%synergy
Darksteel Mutation
35%inclusion16 decks46 decks
29%synergy
Sigil of the Empty Throne
35%inclusion16 decks46 decks
29%synergy
Sheltered by Ghosts
35%inclusion16 decks46 decks
32%synergy
Imprisoned in the Moon
33%inclusion15 decks46 decks
26%synergy
Starfield of Nyx
33%inclusion15 decks46 decks
29%synergy
Cacophony Unleashed
30%inclusion14 decks46 decks
29%synergy
Out of the Tombs
30%inclusion14 decks46 decks
30%synergy
The Tale of Tamiyo
30%inclusion14 decks46 decks
30%synergy
Seal of Removal
30%inclusion14 decks46 decks
30%synergy
Touch the Spirit Realm
28%inclusion13 decks46 decks
26%synergy
Authority of the Consuls
28%inclusion13 decks46 decks
16%synergy
Solitary Confinement
28%inclusion13 decks46 decks
26%synergy
Hallowed Haunting
28%inclusion13 decks46 decks
26%synergy
Greater Auramancy
28%inclusion13 decks46 decks
24%synergy
The Meathook Massacre
26%inclusion12 decks46 decks
23%synergy
Copy Enchantment
26%inclusion12 decks46 decks
21%synergy
Leyline of Anticipation
26%inclusion12 decks46 decks
22%synergy
Static Prison
26%inclusion12 decks46 decks
26%synergy
Oubliette
26%inclusion12 decks46 decks
25%synergy
Ethereal Armor
26%inclusion12 decks46 decks
21%synergy
Aura of Silence
26%inclusion12 decks46 decks
23%synergy
Stillness in Motion
26%inclusion11 decks43 decks
25%synergy
Nowhere to Run
24%inclusion11 decks46 decks
23%synergy
Defiled Crypt // Cadaver Lab
24%inclusion11 decks46 decks
23%synergy
Land Tax
22%inclusion10 decks46 decks
16%synergy
Trouble in Pairs
22%inclusion10 decks46 decks
16%synergy
Extravagant Replication
20%inclusion9 decks46 decks
15%synergy
Timely Ward
20%inclusion9 decks46 decks
15%synergy
Monologue Tax
17%inclusion8 decks46 decks
11%synergy
Black Market Connections
17%inclusion8 decks46 decks
3%synergy
Teval's Judgment
16%inclusion7 decks43 decks
15%synergy
Secrets of the Dead
15%inclusion7 decks46 decks
15%synergy
Phyrexian Arena
15%inclusion7 decks46 decks
1%synergy
One with the Multiverse
13%inclusion6 decks46 decks
8%synergy
Tinybones Joins Up
13%inclusion6 decks46 decks
12%synergy
Utter Insignificance
13%inclusion6 decks46 decks
13%synergy
Chronic Flooding
13%inclusion6 decks46 decks
13%synergy
Out of Time
13%inclusion6 decks46 decks
12%synergy
Shark Typhoon
13%inclusion6 decks46 decks
7%synergy
All That Glitters
13%inclusion6 decks46 decks
4%synergy
Smuggler's Share
11%inclusion5 decks46 decks
9%synergy
Court of Cunning
11%inclusion5 decks46 decks
10%synergy
Planeswalkers
Ashiok, Dream Render
6.5%inclusion3 decks46 decks
5%synergy
Utility Lands
Hall of Heliod's Generosity
65%inclusion30 decks46 decks
52%synergy
Bojuka Bog
41%inclusion19 decks46 decks
14%synergy
Otawara, Soaring City
26%inclusion12 decks46 decks
7%synergy
Cephalid Coliseum
22%inclusion10 decks46 decks
18%synergy
Takenuma, Abandoned Mire
17%inclusion8 decks46 decks
11%synergy
Geier Reach Sanitarium
8.7%inclusion4 decks46 decks
5%synergy
Eiganjo, Seat of the Empire
8.7%inclusion4 decks46 decks
4%synergy
Reliquary Tower
8.7%inclusion4 decks46 decks
-25%synergy
Temple of the False God
8.7%inclusion4 decks46 decks
1%synergy
Urborg, Tomb of Yawgmoth
8.7%inclusion4 decks46 decks
-4%synergy
Rogue's Passage
8.7%inclusion4 decks46 decks
-1%synergy
Mystic Sanctuary
6.5%inclusion3 decks46 decks
3%synergy
Urza's Saga
6.5%inclusion3 decks46 decks
-5%synergy
Nephalia Drownyard
6.5%inclusion3 decks46 decks
6%synergy
Mana Artifacts
Sol Ring
87%inclusion40 decks46 decks
-3%synergy
Arcane Signet
83%inclusion38 decks46 decks
-5%synergy
Talisman of Progress
57%inclusion26 decks46 decks
13%synergy
Talisman of Hierarchy
50%inclusion23 decks46 decks
6%synergy
Talisman of Dominance
48%inclusion22 decks46 decks
-2%synergy
Azorius Signet
33%inclusion15 decks46 decks
2%synergy
Fellwar Stone
30%inclusion14 decks46 decks
-3%synergy
Orzhov Signet
30%inclusion14 decks46 decks
-2%synergy
Dimir Signet
22%inclusion10 decks46 decks
-9%synergy
Mind Stone
8.7%inclusion4 decks46 decks
-3%synergy
Chromatic Lantern
6.5%inclusion3 decks46 decks
-6%synergy
Bender's Waterskin
5.6%inclusion2 decks36 decks
0%synergy
Lands
Command Tower
100%inclusion46 decks46 decks
7%synergy
Swamp
96%inclusion44 decks46 decks
4%synergy
Island
96%inclusion44 decks46 decks
3%synergy
Plains
96%inclusion44 decks46 decks
4%synergy
Exotic Orchard
65%inclusion30 decks46 decks
7%synergy
Caves of Koilos
65%inclusion30 decks46 decks
30%synergy
Hallowed Fountain
65%inclusion30 decks46 decks
15%synergy
Watery Grave
65%inclusion30 decks46 decks
14%synergy
Adarkar Wastes
63%inclusion29 decks46 decks
31%synergy
Godless Shrine
61%inclusion28 decks46 decks
10%synergy
Underground River
59%inclusion27 decks46 decks
24%synergy
Undercity Sewers
54%inclusion25 decks46 decks
40%synergy
Flooded Strand
54%inclusion25 decks46 decks
16%synergy
Polluted Delta
52%inclusion24 decks46 decks
14%synergy
Arcane Sanctum
50%inclusion23 decks46 decks
-4%synergy
Meticulous Archive
50%inclusion23 decks46 decks
36%synergy
Marsh Flats
46%inclusion21 decks46 decks
10%synergy
Shadowy Backstreet
43%inclusion20 decks46 decks
31%synergy
Isolated Chapel
43%inclusion20 decks46 decks
2%synergy
Vault of Champions
43%inclusion20 decks46 decks
11%synergy
Sea of Clouds
41%inclusion19 decks46 decks
6%synergy
Morphic Pool
39%inclusion18 decks46 decks
5%synergy
Glacial Fortress
35%inclusion16 decks46 decks
-8%synergy
Drowned Catacomb
35%inclusion16 decks46 decks
-3%synergy
Deserted Beach
35%inclusion16 decks46 decks
14%synergy
Floodfarm Verge
35%inclusion16 decks46 decks
24%synergy
Prairie Stream
33%inclusion15 decks46 decks
-8%synergy
Raffine's Tower
33%inclusion15 decks46 decks
-8%synergy
Sunken Hollow
33%inclusion15 decks46 decks
-7%synergy
Gloomlake Verge
33%inclusion15 decks46 decks
22%synergy
Shipwreck Marsh
30%inclusion14 decks46 decks
10%synergy
Terramorphic Expanse
28%inclusion13 decks46 decks
12%synergy
Valgavoth's Lair
28%inclusion13 decks46 decks
26%synergy
Evolving Wilds
28%inclusion13 decks46 decks
4%synergy
Underground Sea
24%inclusion11 decks46 decks
8%synergy
Scrubland
24%inclusion11 decks46 decks
8%synergy
Tundra
22%inclusion10 decks46 decks
6%synergy
Temple of Deceit
22%inclusion10 decks46 decks
4%synergy
Ash Barrens
22%inclusion10 decks46 decks
11%synergy
Sink into Stupor
22%inclusion10 decks46 decks
9%synergy
Temple of Silence
22%inclusion10 decks46 decks
3%synergy
Misty Rainforest
20%inclusion9 decks46 decks
9%synergy
Azorius Chancery
20%inclusion9 decks46 decks
6%synergy
Contaminated Landscape
20%inclusion9 decks46 decks
6%synergy
Temple of Enlightenment
20%inclusion9 decks46 decks
4%synergy
Shattered Sanctum
20%inclusion9 decks46 decks
3%synergy
Obscura Storefront
20%inclusion9 decks46 decks
10%synergy
Dimir Aqueduct
17%inclusion8 decks46 decks
4%synergy
Tainted Field
17%inclusion8 decks46 decks
10%synergy
Scalding Tarn
17%inclusion8 decks46 decks
7%synergy
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