The Master of Keys (Commander) - Upgraded

The Master of Keys
Rank #300
528decks
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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
Battles
Utility Lands
Mana Artifacts
Lands
Back to Top
Eiganjo Dynastorian
13%inclusion11 decks85 decks
12%synergy
Changing Loyalty
7.1%inclusion6 decks85 decks
6%synergy
Primary Research
4.7%inclusion4 decks85 decks
5%synergy
Turbulent Moor
3.5%inclusion3 decks85 decks
2%synergy
Eclipsed Steppe
2.4%inclusion2 decks85 decks
1%synergy
High Synergy Cards
Inquisitive Glimmer
79%inclusion415 decks528 decks
71%synergy
Ripples of Undeath
73%inclusion385 decks528 decks
70%synergy
Entity Tracker
70%inclusion368 decks528 decks
64%synergy
Starfield Mystic
66%inclusion350 decks528 decks
60%synergy
Animate Dead
68%inclusion361 decks528 decks
59%synergy
Gravebreaker Lamia
59%inclusion314 decks528 decks
58%synergy
Mesa Enchantress
66%inclusion346 decks528 decks
57%synergy
Demon of Fate's Design
59%inclusion314 decks528 decks
54%synergy
Scrabbling Skullcrab
54%inclusion283 decks528 decks
53%synergy
Hall of Heliod's Generosity
65%inclusion342 decks528 decks
52%synergy
Top Cards
Doomwake Giant
55%inclusion289 decks528 decks
49%synergy
Fear of Sleep Paralysis
55%inclusion288 decks528 decks
49%synergy
Dress Down
54%inclusion284 decks528 decks
52%synergy
Mystic Remora
54%inclusion283 decks528 decks
33%synergy
Necromancy
53%inclusion279 decks528 decks
48%synergy
Sphere of Safety
52%inclusion276 decks528 decks
43%synergy
Overlord of the Floodpits
51%inclusion269 decks528 decks
47%synergy
Swords to Plowshares
51%inclusion269 decks528 decks
-17%synergy
Mirrormade
51%inclusion267 decks528 decks
41%synergy
Secret Arcade // Dusty Parlor
49%inclusion261 decks528 decks
45%synergy
Game Changers
Smothering Tithe
38%inclusion201 decks528 decks
7%synergy
Rhystic Study
28%inclusion147 decks528 decks
-3%synergy
Enlightened Tutor
12%inclusion61 decks528 decks
-8%synergy
Gifts Ungiven
9.3%inclusion49 decks528 decks
7%synergy
Necropotence
6.8%inclusion36 decks528 decks
0%synergy
Serra's Sanctum
6.3%inclusion33 decks528 decks
5%synergy
Demonic Tutor
6.1%inclusion32 decks528 decks
-14%synergy
Cyclonic Rift
5.9%inclusion31 decks528 decks
-17%synergy
Farewell
5.7%inclusion30 decks528 decks
-7%synergy
Teferi's Protection
5.5%inclusion29 decks528 decks
-11%synergy
Creatures
Overlord of the Balemurk
47%inclusion248 decks528 decks
45%synergy
Ondu Spiritdancer
46%inclusion241 decks528 decks
40%synergy
Fear of Impostors
45%inclusion238 decks528 decks
44%synergy
Victor, Valgavoth's Seneschal
45%inclusion236 decks528 decks
43%synergy
Zur, Eternal Schemer
44%inclusion232 decks528 decks
41%synergy
Silent Hallcreeper
34%inclusion179 decks528 decks
29%synergy
Zur the Enchanter
33%inclusion175 decks528 decks
28%synergy
Ghostly Dancers
31%inclusion164 decks528 decks
29%synergy
Enduring Curiosity
26%inclusion136 decks528 decks
18%synergy
Heliod, the Radiant Dawn
25%inclusion134 decks528 decks
22%synergy
Grim Guardian
25%inclusion130 decks528 decks
22%synergy
Soaring Lightbringer
23%inclusion124 decks528 decks
19%synergy
Moon-Blessed Cleric
23%inclusion124 decks528 decks
19%synergy
Archon of Sun's Grace
22%inclusion116 decks528 decks
18%synergy
Abdel Adrian, Gorion's Ward
20%inclusion104 decks528 decks
18%synergy
Sage of Mysteries
19%inclusion100 decks528 decks
19%synergy
Aminatou, Veil Piercer
17%inclusion90 decks528 decks
16%synergy
Overlord of the Mistmoors
16%inclusion87 decks528 decks
14%synergy
Mindwrack Harpy
15%inclusion77 decks528 decks
14%synergy
Hedron Crab
14%inclusion74 decks528 decks
13%synergy
Alseid of Life's Bounty
14%inclusion74 decks528 decks
13%synergy
Archetype of Imagination
13%inclusion71 decks528 decks
9%synergy
Lotho, Corrupt Shirriff
13%inclusion69 decks528 decks
-4%synergy
Athreos, Shroud-Veiled
13%inclusion68 decks528 decks
9%synergy
Balemurk Leech
13%inclusion66 decks528 decks
12%synergy
Ancient Cellarspawn
12%inclusion63 decks528 decks
9%synergy
Witch Enchanter
11%inclusion60 decks528 decks
4%synergy
Hullbreaker Horror
11%inclusion60 decks528 decks
5%synergy
Esper Sentinel
11%inclusion59 decks528 decks
-16%synergy
Ledger Shredder
11%inclusion56 decks528 decks
2%synergy
Skullsnap Nuisance
10%inclusion51 decks528 decks
9%synergy
Gremlin Tamer
10%inclusion51 decks528 decks
9%synergy
Nashi, Searcher in the Dark
9.5%inclusion50 decks528 decks
9%synergy
Sun Titan
9.1%inclusion48 decks528 decks
1%synergy
Spirited Companion
8.7%inclusion46 decks528 decks
7%synergy
Lurrus of the Dream-Den
8.3%inclusion44 decks528 decks
7%synergy
Summon: Yojimbo
8.2%inclusion34 decks413 decks
7%synergy
Stenn, Paranoid Partisan
7.4%inclusion39 decks528 decks
6%synergy
Solemn Simulacrum
7.0%inclusion37 decks528 decks
-7%synergy
Grand Abolisher
7.0%inclusion37 decks528 decks
-7%synergy
Auramancer
6.8%inclusion36 decks528 decks
4%synergy
Valley Floodcaller
6.6%inclusion35 decks528 decks
3%synergy
Emet-Selch of the Third Seat
6.5%inclusion27 decks416 decks
-3%synergy
Laboratory Maniac
6.4%inclusion34 decks528 decks
3%synergy
Fear of Infinity
6.3%inclusion33 decks528 decks
6%synergy
Stitcher's Supplier
6.3%inclusion33 decks528 decks
6%synergy
Nightmare Shepherd
6.3%inclusion33 decks528 decks
4%synergy
Valgavoth, Terror Eater
6.3%inclusion33 decks528 decks
3%synergy
Summon: Bahamut
6.3%inclusion26 decks416 decks
5%synergy
Starnheim Courser
5.9%inclusion31 decks528 decks
2%synergy
Instants
Counterspell
35%inclusion187 decks528 decks
-6%synergy
Arcane Denial
32%inclusion169 decks528 decks
12%synergy
Entomb
29%inclusion154 decks528 decks
22%synergy
An Offer You Can't Refuse
29%inclusion151 decks528 decks
1%synergy
Path to Exile
26%inclusion137 decks528 decks
-16%synergy
Dark Ritual
25%inclusion133 decks528 decks
5%synergy
Void Rend
19%inclusion98 decks528 decks
-16%synergy
Swan Song
17%inclusion90 decks528 decks
-3%synergy
Inkshield
17%inclusion89 decks528 decks
7%synergy
Dovin's Veto
17%inclusion88 decks528 decks
-9%synergy
Frantic Search
16%inclusion86 decks528 decks
-2%synergy
Thirst for Meaning
16%inclusion83 decks528 decks
14%synergy
Sink into Stupor
14%inclusion76 decks528 decks
2%synergy
Negate
13%inclusion71 decks528 decks
-3%synergy
Otherworldly Gaze
13%inclusion66 decks528 decks
10%synergy
Mana Drain
12%inclusion63 decks528 decks
-5%synergy
Fell the Profane
12%inclusion62 decks528 decks
3%synergy
Brainstorm
11%inclusion57 decks528 decks
-6%synergy
Anguished Unmaking
9.1%inclusion48 decks528 decks
-16%synergy
Fact or Fiction
6.6%inclusion35 decks528 decks
3%synergy
Utter End
6.1%inclusion32 decks528 decks
0%synergy
Cabal Ritual
5.5%inclusion29 decks528 decks
2%synergy
Faithful Mending
5.5%inclusion29 decks528 decks
2%synergy
Waterlogged Teachings
5.3%inclusion28 decks528 decks
1%synergy
Generous Gift
5.3%inclusion28 decks528 decks
-9%synergy
Return to Dust
5.1%inclusion27 decks528 decks
2%synergy
Sorceries
Sevinne's Reclamation
46%inclusion245 decks528 decks
38%synergy
Redress Fate
34%inclusion182 decks528 decks
29%synergy
Windfall
24%inclusion129 decks528 decks
11%synergy
Reanimate
23%inclusion119 decks528 decks
6%synergy
Singularity Rupture
21%inclusion78 decks369 decks
19%synergy
Extinguish All Hope
19%inclusion100 decks528 decks
17%synergy
Dance of the Manse
17%inclusion91 decks528 decks
14%synergy
Glimpse the Unthinkable
15%inclusion78 decks528 decks
14%synergy
Time Wipe
14%inclusion72 decks528 decks
7%synergy
Idyllic Tutor
14%inclusion72 decks528 decks
9%synergy
Damn
14%inclusion72 decks528 decks
-7%synergy
Toxic Deluge
13%inclusion70 decks528 decks
-6%synergy
Resurgent Belief
12%inclusion61 decks528 decks
10%synergy
Supreme Verdict
11%inclusion60 decks528 decks
-3%synergy
Space-Time Anomaly
11%inclusion39 decks364 decks
9%synergy
Demonic Counsel
10%inclusion53 decks528 decks
9%synergy
Buried Alive
10%inclusion51 decks528 decks
5%synergy
Replenish
9.5%inclusion50 decks528 decks
8%synergy
Unmarked Grave
8.1%inclusion43 decks528 decks
7%synergy
Ponder
7.2%inclusion38 decks528 decks
-2%synergy
Lively Dirge
7.0%inclusion37 decks528 decks
6%synergy
Austere Command
5.5%inclusion29 decks528 decks
-3%synergy
Utility Artifacts
Mesmeric Orb
19%inclusion99 decks528 decks
18%synergy
Cloud Key
13%inclusion69 decks528 decks
10%synergy
Lightning Greaves
7.8%inclusion41 decks528 decks
-15%synergy
Wayfarer's Bauble
6.8%inclusion36 decks528 decks
-1%synergy
Swiftfoot Boots
5.7%inclusion30 decks528 decks
-19%synergy
Enchantments
Amphibian Downpour
48%inclusion254 decks528 decks
44%synergy
Propaganda
45%inclusion236 decks528 decks
16%synergy
Grasp of Fate
43%inclusion229 decks528 decks
37%synergy
Seal of Cleansing
43%inclusion227 decks528 decks
42%synergy
Sigil of the Empty Throne
40%inclusion210 decks528 decks
34%synergy
Cemetery Tampering
39%inclusion205 decks528 decks
38%synergy
Ghostly Prison
38%inclusion202 decks528 decks
16%synergy
Estrid's Invocation
37%inclusion196 decks528 decks
32%synergy
Blind Obedience
34%inclusion181 decks528 decks
22%synergy
Starfield of Nyx
34%inclusion180 decks528 decks
30%synergy
Cacophony Unleashed
31%inclusion166 decks528 decks
30%synergy
Monologue Tax
31%inclusion166 decks528 decks
25%synergy
Dance of the Dead
30%inclusion158 decks528 decks
28%synergy
The Tale of Tamiyo
27%inclusion140 decks528 decks
26%synergy
Stillness in Motion
25%inclusion116 decks469 decks
24%synergy
Darksteel Mutation
25%inclusion130 decks528 decks
19%synergy
Seal of Removal
24%inclusion128 decks528 decks
24%synergy
The Meathook Massacre
23%inclusion120 decks528 decks
19%synergy
Imprisoned in the Moon
22%inclusion117 decks528 decks
15%synergy
Phyrexian Arena
22%inclusion116 decks528 decks
8%synergy
Timely Ward
22%inclusion114 decks528 decks
17%synergy
Sheltered by Ghosts
21%inclusion110 decks528 decks
18%synergy
Greater Auramancy
21%inclusion109 decks528 decks
16%synergy
Defiled Crypt // Cadaver Lab
21%inclusion109 decks528 decks
20%synergy
Extravagant Replication
20%inclusion107 decks528 decks
15%synergy
Shark Typhoon
20%inclusion107 decks528 decks
14%synergy
All That Glitters
20%inclusion107 decks528 decks
12%synergy
Black Market Connections
20%inclusion106 decks528 decks
5%synergy
Polluted Cistern // Dim Oubliette
20%inclusion105 decks528 decks
19%synergy
Ethereal Armor
20%inclusion104 decks528 decks
15%synergy
Copy Enchantment
20%inclusion103 decks528 decks
15%synergy
Out of the Tombs
19%inclusion102 decks528 decks
19%synergy
Hallowed Haunting
18%inclusion94 decks528 decks
15%synergy
Authority of the Consuls
18%inclusion93 decks528 decks
5%synergy
Leyline of Anticipation
17%inclusion92 decks528 decks
13%synergy
Touch the Spirit Realm
17%inclusion89 decks528 decks
15%synergy
The Eldest Reborn
16%inclusion84 decks528 decks
13%synergy
Restricted Office // Lecture Hall
16%inclusion83 decks528 decks
14%synergy
Mirror Room // Fractured Realm
16%inclusion82 decks528 decks
13%synergy
Static Prison
15%inclusion81 decks528 decks
15%synergy
Bottomless Pool // Locker Room
15%inclusion79 decks528 decks
13%synergy
Land Tax
15%inclusion78 decks528 decks
9%synergy
Teval's Judgment
15%inclusion70 decks475 decks
14%synergy
Secrets of the Dead
14%inclusion75 decks528 decks
14%synergy
Nowhere to Run
14%inclusion73 decks528 decks
13%synergy
Court of Cunning
13%inclusion71 decks528 decks
12%synergy
Central Elevator // Promising Stairs
13%inclusion69 decks528 decks
12%synergy
Oubliette
13%inclusion68 decks528 decks
11%synergy
One with the Multiverse
13%inclusion67 decks528 decks
8%synergy
Cramped Vents // Access Maze
12%inclusion64 decks528 decks
10%synergy
Battles
Invasion of Theros
6.8%inclusion36 decks528 decks
5%synergy
Utility Lands
Bojuka Bog
43%inclusion228 decks528 decks
16%synergy
Cephalid Coliseum
19%inclusion100 decks528 decks
15%synergy
Otawara, Soaring City
18%inclusion94 decks528 decks
-1%synergy
Takenuma, Abandoned Mire
16%inclusion83 decks528 decks
9%synergy
Reliquary Tower
13%inclusion67 decks528 decks
-21%synergy
Halimar Depths
11%inclusion56 decks528 decks
6%synergy
Urborg, Tomb of Yawgmoth
7.4%inclusion39 decks528 decks
-6%synergy
Urza's Saga
6.3%inclusion33 decks528 decks
-5%synergy
Adagia, Windswept Bastion
5.1%inclusion19 decks369 decks
3%synergy
Rogue's Passage
5.1%inclusion27 decks528 decks
-5%synergy
Mana Artifacts
Sol Ring
88%inclusion464 decks528 decks
-2%synergy
Arcane Signet
86%inclusion456 decks528 decks
-1%synergy
Talisman of Progress
52%inclusion275 decks528 decks
8%synergy
Talisman of Dominance
51%inclusion270 decks528 decks
1%synergy
Talisman of Hierarchy
46%inclusion244 decks528 decks
2%synergy
Azorius Signet
40%inclusion210 decks528 decks
9%synergy
Orzhov Signet
38%inclusion198 decks528 decks
5%synergy
Fellwar Stone
32%inclusion170 decks528 decks
-1%synergy
Dimir Signet
28%inclusion148 decks528 decks
-3%synergy
Mind Stone
14%inclusion72 decks528 decks
2%synergy
Commander's Sphere
11%inclusion60 decks528 decks
-6%synergy
Chromatic Lantern
5.5%inclusion29 decks528 decks
-7%synergy
Lands
Island
97%inclusion511 decks528 decks
4%synergy
Swamp
97%inclusion510 decks528 decks
5%synergy
Plains
96%inclusion507 decks528 decks
4%synergy
Command Tower
96%inclusion506 decks528 decks
3%synergy
Caves of Koilos
62%inclusion327 decks528 decks
26%synergy
Arcane Sanctum
61%inclusion324 decks528 decks
7%synergy
Adarkar Wastes
59%inclusion311 decks528 decks
27%synergy
Godless Shrine
55%inclusion292 decks528 decks
4%synergy
Watery Grave
55%inclusion288 decks528 decks
4%synergy
Underground River
54%inclusion284 decks528 decks
20%synergy
Hallowed Fountain
54%inclusion284 decks528 decks
3%synergy
Exotic Orchard
53%inclusion280 decks528 decks
-6%synergy
Flooded Strand
45%inclusion236 decks528 decks
6%synergy
Polluted Delta
45%inclusion235 decks528 decks
7%synergy
Raffine's Tower
43%inclusion229 decks528 decks
3%synergy
Glacial Fortress
41%inclusion214 decks528 decks
-2%synergy
Isolated Chapel
40%inclusion209 decks528 decks
-1%synergy
Marsh Flats
38%inclusion203 decks528 decks
2%synergy
Drowned Catacomb
35%inclusion187 decks528 decks
-2%synergy
Prairie Stream
35%inclusion185 decks528 decks
-6%synergy
Sunken Hollow
34%inclusion180 decks528 decks
-6%synergy
Sea of Clouds
34%inclusion179 decks528 decks
-1%synergy
Meticulous Archive
34%inclusion179 decks528 decks
20%synergy
Valgavoth's Lair
33%inclusion176 decks528 decks
31%synergy
Undercity Sewers
33%inclusion173 decks528 decks
18%synergy
Vault of Champions
32%inclusion170 decks528 decks
0%synergy
Shadowy Backstreet
31%inclusion165 decks528 decks
19%synergy
Morphic Pool
30%inclusion157 decks528 decks
-4%synergy
Floodfarm Verge
27%inclusion145 decks528 decks
16%synergy
Azorius Chancery
27%inclusion140 decks528 decks
13%synergy
Terramorphic Expanse
25%inclusion132 decks528 decks
9%synergy
Temple of Silence
25%inclusion130 decks528 decks
6%synergy
Evolving Wilds
25%inclusion130 decks528 decks
0%synergy
Temple of Enlightenment
24%inclusion128 decks528 decks
8%synergy
Orzhov Basilica
23%inclusion123 decks528 decks
8%synergy
Temple of Deceit
23%inclusion122 decks528 decks
6%synergy
Tainted Field
23%inclusion122 decks528 decks
16%synergy
Deserted Beach
23%inclusion122 decks528 decks
2%synergy
Gloomlake Verge
23%inclusion121 decks528 decks
12%synergy
Obscura Storefront
23%inclusion121 decks528 decks
13%synergy
Dimir Aqueduct
22%inclusion118 decks528 decks
9%synergy
Shipwreck Marsh
22%inclusion114 decks528 decks
1%synergy
Tainted Isle
21%inclusion111 decks528 decks
15%synergy
Contaminated Landscape
20%inclusion107 decks528 decks
6%synergy
Ash Barrens
17%inclusion90 decks528 decks
6%synergy
Shattered Sanctum
16%inclusion85 decks528 decks
0%synergy
Path of Ancestry
15%inclusion78 decks528 decks
-13%synergy
Sink into Stupor
14%inclusion76 decks528 decks
2%synergy
Fetid Heath
13%inclusion66 decks528 decks
0%synergy
Darkwater Catacombs
12%inclusion65 decks528 decks
-2%synergy
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