The Master of Keys (Commander) - Upgraded

The Master of Keys
Rank #303
597decks
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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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Enchantments
Battles
Utility Lands
Mana Artifacts
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Gleaming Bastion
2.5%inclusion2 decks80 decks
2%synergy
Doom's Time Platform
1.7%inclusion1 decks60 decks
2%synergy
Falcon and Redwing
1.5%inclusion1 decks65 decks
1%synergy
Stark's Ingenuity
1.5%inclusion1 decks65 decks
1%synergy
Super Intelligence
1.3%inclusion1 decks77 decks
1%synergy
High Synergy Cards
Inquisitive Glimmer
77%inclusion462 decks597 decks
70%synergy
Ripples of Undeath
72%inclusion431 decks597 decks
70%synergy
Entity Tracker
68%inclusion406 decks597 decks
62%synergy
Starfield Mystic
65%inclusion391 decks597 decks
59%synergy
Gravebreaker Lamia
58%inclusion347 decks597 decks
57%synergy
Animate Dead
66%inclusion397 decks597 decks
57%synergy
Mesa Enchantress
65%inclusion391 decks597 decks
57%synergy
Demon of Fate's Design
60%inclusion361 decks597 decks
55%synergy
Hall of Heliod's Generosity
65%inclusion388 decks597 decks
52%synergy
Scrabbling Skullcrab
52%inclusion310 decks597 decks
51%synergy
Top Cards
Doomwake Giant
56%inclusion333 decks597 decks
50%synergy
Fear of Sleep Paralysis
55%inclusion329 decks597 decks
50%synergy
Sphere of Safety
53%inclusion318 decks597 decks
44%synergy
Swords to Plowshares
52%inclusion313 decks597 decks
-15%synergy
Dress Down
52%inclusion312 decks597 decks
50%synergy
Mystic Remora
52%inclusion308 decks597 decks
31%synergy
Necromancy
51%inclusion304 decks597 decks
46%synergy
Mirrormade
50%inclusion300 decks597 decks
40%synergy
Overlord of the Floodpits
49%inclusion293 decks597 decks
46%synergy
Secret Arcade // Dusty Parlor
49%inclusion293 decks597 decks
45%synergy
Game Changers
Smothering Tithe
39%inclusion234 decks597 decks
9%synergy
Rhystic Study
30%inclusion179 decks597 decks
-0%synergy
Enlightened Tutor
13%inclusion80 decks597 decks
-5%synergy
Gifts Ungiven
9.4%inclusion56 decks597 decks
7%synergy
Necropotence
6.7%inclusion40 decks597 decks
0%synergy
Cyclonic Rift
6.4%inclusion38 decks597 decks
-16%synergy
Serra's Sanctum
6.2%inclusion37 decks597 decks
5%synergy
Demonic Tutor
6.0%inclusion36 decks597 decks
-14%synergy
Farewell
5.9%inclusion35 decks597 decks
-6%synergy
Fierce Guardianship
5.2%inclusion31 decks597 decks
-15%synergy
Creatures
Overlord of the Balemurk
47%inclusion279 decks597 decks
45%synergy
Ondu Spiritdancer
46%inclusion272 decks597 decks
40%synergy
Victor, Valgavoth's Seneschal
43%inclusion259 decks597 decks
42%synergy
Zur, Eternal Schemer
43%inclusion259 decks597 decks
40%synergy
Fear of Impostors
43%inclusion256 decks597 decks
41%synergy
Silent Hallcreeper
34%inclusion200 decks597 decks
29%synergy
Zur the Enchanter
32%inclusion194 decks597 decks
28%synergy
Ghostly Dancers
29%inclusion172 decks597 decks
26%synergy
Enduring Curiosity
27%inclusion160 decks597 decks
19%synergy
Heliod, the Radiant Dawn
25%inclusion150 decks597 decks
22%synergy
Grim Guardian
25%inclusion147 decks597 decks
22%synergy
Soaring Lightbringer
23%inclusion139 decks597 decks
19%synergy
Moon-Blessed Cleric
23%inclusion139 decks597 decks
19%synergy
Archon of Sun's Grace
22%inclusion130 decks597 decks
17%synergy
Sage of Mysteries
19%inclusion112 decks597 decks
18%synergy
Abdel Adrian, Gorion's Ward
18%inclusion109 decks597 decks
17%synergy
Aminatou, Veil Piercer
17%inclusion104 decks597 decks
16%synergy
Overlord of the Mistmoors
16%inclusion98 decks597 decks
14%synergy
Eiganjo Dynastorian
16%inclusion30 decks186 decks
15%synergy
Hedron Crab
15%inclusion90 decks597 decks
14%synergy
Alseid of Life's Bounty
15%inclusion87 decks597 decks
13%synergy
Mindwrack Harpy
14%inclusion85 decks597 decks
14%synergy
Lotho, Corrupt Shirriff
14%inclusion83 decks597 decks
-3%synergy
Athreos, Shroud-Veiled
14%inclusion83 decks597 decks
10%synergy
Archetype of Imagination
13%inclusion76 decks597 decks
8%synergy
Ancient Cellarspawn
12%inclusion73 decks597 decks
9%synergy
Balemurk Leech
12%inclusion72 decks597 decks
11%synergy
Esper Sentinel
12%inclusion69 decks597 decks
-16%synergy
Witch Enchanter
11%inclusion65 decks597 decks
4%synergy
Hullbreaker Horror
11%inclusion63 decks597 decks
5%synergy
Skullsnap Nuisance
10%inclusion60 decks597 decks
10%synergy
Ledger Shredder
10%inclusion58 decks597 decks
1%synergy
Gremlin Tamer
10%inclusion57 decks597 decks
9%synergy
Spirited Companion
10%inclusion57 decks597 decks
8%synergy
Nashi, Searcher in the Dark
9.0%inclusion54 decks597 decks
9%synergy
Sun Titan
9.0%inclusion54 decks597 decks
1%synergy
Summon: Yojimbo
8.3%inclusion40 decks482 decks
7%synergy
Grand Abolisher
7.7%inclusion46 decks597 decks
-7%synergy
Stenn, Paranoid Partisan
7.5%inclusion45 decks597 decks
6%synergy
Lurrus of the Dream-Den
7.4%inclusion44 decks597 decks
6%synergy
Solemn Simulacrum
7.0%inclusion42 decks597 decks
-6%synergy
Laboratory Maniac
7.0%inclusion42 decks597 decks
4%synergy
Auramancer
7.0%inclusion42 decks597 decks
4%synergy
Nightmare Shepherd
6.9%inclusion41 decks597 decks
5%synergy
Summon: Bahamut
6.8%inclusion33 decks485 decks
5%synergy
Valley Floodcaller
6.5%inclusion39 decks597 decks
3%synergy
Emet-Selch of the Third Seat
6.4%inclusion31 decks485 decks
-3%synergy
Fear of Infinity
6.4%inclusion38 decks597 decks
6%synergy
Stitcher's Supplier
6.4%inclusion38 decks597 decks
6%synergy
Starnheim Courser
6.0%inclusion36 decks597 decks
3%synergy
Instants
Counterspell
36%inclusion217 decks597 decks
-6%synergy
Arcane Denial
32%inclusion189 decks597 decks
11%synergy
Entomb
29%inclusion173 decks597 decks
22%synergy
An Offer You Can't Refuse
28%inclusion165 decks597 decks
-0%synergy
Path to Exile
27%inclusion160 decks597 decks
-15%synergy
Dark Ritual
24%inclusion146 decks597 decks
4%synergy
Void Rend
18%inclusion110 decks597 decks
-16%synergy
Swan Song
17%inclusion101 decks597 decks
-3%synergy
Dovin's Veto
16%inclusion98 decks597 decks
-10%synergy
Inkshield
16%inclusion98 decks597 decks
6%synergy
Frantic Search
16%inclusion93 decks597 decks
-3%synergy
Thirst for Meaning
15%inclusion91 decks597 decks
14%synergy
Sink into Stupor
15%inclusion89 decks597 decks
2%synergy
Mana Drain
13%inclusion77 decks597 decks
-4%synergy
Otherworldly Gaze
13%inclusion77 decks597 decks
11%synergy
Negate
13%inclusion75 decks597 decks
-4%synergy
Fell the Profane
12%inclusion70 decks597 decks
3%synergy
Brainstorm
11%inclusion63 decks597 decks
-6%synergy
Anguished Unmaking
10%inclusion60 decks597 decks
-16%synergy
Fact or Fiction
7.2%inclusion43 decks597 decks
4%synergy
Waterlogged Teachings
6.4%inclusion38 decks597 decks
2%synergy
Utter End
6.0%inclusion36 decks597 decks
-0%synergy
Cabal Ritual
5.2%inclusion31 decks597 decks
2%synergy
Generous Gift
5.2%inclusion31 decks597 decks
-9%synergy
Faithful Mending
5.0%inclusion30 decks597 decks
1%synergy
Sorceries
Sevinne's Reclamation
44%inclusion261 decks597 decks
35%synergy
Redress Fate
35%inclusion207 decks597 decks
29%synergy
Windfall
24%inclusion146 decks597 decks
11%synergy
Reanimate
21%inclusion127 decks597 decks
5%synergy
Singularity Rupture
20%inclusion87 decks439 decks
18%synergy
Extinguish All Hope
19%inclusion113 decks597 decks
17%synergy
Dance of the Manse
18%inclusion105 decks597 decks
14%synergy
Glimpse the Unthinkable
15%inclusion90 decks597 decks
15%synergy
Idyllic Tutor
15%inclusion89 decks597 decks
11%synergy
Toxic Deluge
14%inclusion86 decks597 decks
-5%synergy
Time Wipe
13%inclusion77 decks597 decks
7%synergy
Damn
13%inclusion76 decks597 decks
-7%synergy
Supreme Verdict
12%inclusion71 decks597 decks
-3%synergy
Resurgent Belief
12%inclusion70 decks597 decks
10%synergy
Space-Time Anomaly
10%inclusion45 decks434 decks
9%synergy
Replenish
10%inclusion59 decks597 decks
8%synergy
Buried Alive
10%inclusion57 decks597 decks
5%synergy
Demonic Counsel
8.7%inclusion52 decks597 decks
8%synergy
Ponder
7.4%inclusion44 decks597 decks
-2%synergy
Unmarked Grave
7.0%inclusion42 decks597 decks
6%synergy
Lively Dirge
6.4%inclusion38 decks597 decks
5%synergy
Austere Command
5.9%inclusion35 decks597 decks
-2%synergy
Utility Artifacts
Mesmeric Orb
20%inclusion117 decks597 decks
18%synergy
Cloud Key
13%inclusion76 decks597 decks
9%synergy
Lightning Greaves
7.4%inclusion44 decks597 decks
-15%synergy
Wayfarer's Bauble
6.9%inclusion41 decks597 decks
-0%synergy
Swiftfoot Boots
5.7%inclusion34 decks597 decks
-18%synergy
Perpetual Timepiece
5.2%inclusion31 decks597 decks
5%synergy
Crucible of Worlds
5.0%inclusion30 decks597 decks
4%synergy
Enchantments
Amphibian Downpour
47%inclusion281 decks597 decks
42%synergy
Propaganda
46%inclusion274 decks597 decks
17%synergy
Grasp of Fate
42%inclusion253 decks597 decks
36%synergy
Seal of Cleansing
42%inclusion249 decks597 decks
40%synergy
Sigil of the Empty Throne
41%inclusion245 decks597 decks
35%synergy
Ghostly Prison
40%inclusion240 decks597 decks
17%synergy
Cemetery Tampering
38%inclusion229 decks597 decks
38%synergy
Starfield of Nyx
36%inclusion215 decks597 decks
32%synergy
Estrid's Invocation
36%inclusion214 decks597 decks
31%synergy
Blind Obedience
34%inclusion200 decks597 decks
22%synergy
Cacophony Unleashed
32%inclusion189 decks597 decks
30%synergy
Monologue Tax
31%inclusion185 decks597 decks
24%synergy
Dance of the Dead
28%inclusion168 decks597 decks
26%synergy
The Tale of Tamiyo
25%inclusion147 decks597 decks
24%synergy
Darksteel Mutation
24%inclusion143 decks597 decks
18%synergy
Seal of Removal
23%inclusion140 decks597 decks
23%synergy
Stillness in Motion
23%inclusion124 decks538 decks
23%synergy
Greater Auramancy
22%inclusion131 decks597 decks
18%synergy
Phyrexian Arena
22%inclusion130 decks597 decks
8%synergy
The Meathook Massacre
22%inclusion129 decks597 decks
18%synergy
Imprisoned in the Moon
22%inclusion129 decks597 decks
15%synergy
Timely Ward
21%inclusion127 decks597 decks
16%synergy
Shark Typhoon
21%inclusion126 decks597 decks
15%synergy
All That Glitters
21%inclusion126 decks597 decks
13%synergy
Defiled Crypt // Cadaver Lab
20%inclusion120 decks597 decks
19%synergy
Polluted Cistern // Dim Oubliette
20%inclusion119 decks597 decks
19%synergy
Black Market Connections
20%inclusion119 decks597 decks
5%synergy
Extravagant Replication
20%inclusion118 decks597 decks
15%synergy
Sheltered by Ghosts
20%inclusion118 decks597 decks
17%synergy
Ethereal Armor
20%inclusion117 decks597 decks
15%synergy
Copy Enchantment
19%inclusion116 decks597 decks
15%synergy
Out of the Tombs
19%inclusion111 decks597 decks
18%synergy
Authority of the Consuls
17%inclusion104 decks597 decks
4%synergy
Leyline of Anticipation
17%inclusion104 decks597 decks
13%synergy
Hallowed Haunting
17%inclusion104 decks597 decks
15%synergy
The Eldest Reborn
16%inclusion95 decks597 decks
14%synergy
Touch the Spirit Realm
15%inclusion91 decks597 decks
13%synergy
Mirror Room // Fractured Realm
15%inclusion89 decks597 decks
13%synergy
Bottomless Pool // Locker Room
15%inclusion88 decks597 decks
13%synergy
Restricted Office // Lecture Hall
15%inclusion87 decks597 decks
13%synergy
Static Prison
15%inclusion87 decks597 decks
14%synergy
Court of Cunning
14%inclusion86 decks597 decks
13%synergy
Land Tax
14%inclusion86 decks597 decks
8%synergy
Teval's Judgment
14%inclusion78 decks544 decks
14%synergy
Secrets of the Dead
14%inclusion83 decks597 decks
14%synergy
One with the Multiverse
14%inclusion82 decks597 decks
9%synergy
Nowhere to Run
14%inclusion81 decks597 decks
12%synergy
Central Elevator // Promising Stairs
13%inclusion77 decks597 decks
12%synergy
Oubliette
13%inclusion76 decks597 decks
11%synergy
Cramped Vents // Access Maze
12%inclusion73 decks597 decks
10%synergy
Battles
Invasion of Theros
6.5%inclusion39 decks597 decks
5%synergy
Utility Lands
Bojuka Bog
45%inclusion270 decks597 decks
18%synergy
Cephalid Coliseum
17%inclusion101 decks597 decks
13%synergy
Otawara, Soaring City
16%inclusion97 decks597 decks
-3%synergy
Takenuma, Abandoned Mire
15%inclusion92 decks597 decks
9%synergy
Reliquary Tower
13%inclusion80 decks597 decks
-21%synergy
Halimar Depths
11%inclusion64 decks597 decks
6%synergy
Urborg, Tomb of Yawgmoth
7.4%inclusion44 decks597 decks
-6%synergy
Adagia, Windswept Bastion
6.8%inclusion30 decks439 decks
4%synergy
Urza's Saga
6.5%inclusion39 decks597 decks
-5%synergy
Mana Artifacts
Sol Ring
88%inclusion525 decks597 decks
-2%synergy
Arcane Signet
87%inclusion519 decks597 decks
-1%synergy
Talisman of Progress
52%inclusion312 decks597 decks
8%synergy
Talisman of Dominance
52%inclusion308 decks597 decks
1%synergy
Talisman of Hierarchy
47%inclusion282 decks597 decks
2%synergy
Azorius Signet
40%inclusion239 decks597 decks
10%synergy
Orzhov Signet
38%inclusion227 decks597 decks
7%synergy
Fellwar Stone
32%inclusion190 decks597 decks
-1%synergy
Dimir Signet
28%inclusion167 decks597 decks
-2%synergy
Mind Stone
14%inclusion84 decks597 decks
2%synergy
Commander's Sphere
12%inclusion71 decks597 decks
-5%synergy
Chromatic Lantern
5.4%inclusion32 decks597 decks
-7%synergy
Lands
Swamp
97%inclusion577 decks597 decks
5%synergy
Island
96%inclusion576 decks597 decks
3%synergy
Command Tower
95%inclusion570 decks597 decks
3%synergy
Plains
95%inclusion568 decks597 decks
3%synergy
Caves of Koilos
62%inclusion369 decks597 decks
26%synergy
Arcane Sanctum
60%inclusion359 decks597 decks
6%synergy
Adarkar Wastes
58%inclusion349 decks597 decks
26%synergy
Godless Shrine
56%inclusion334 decks597 decks
4%synergy
Watery Grave
56%inclusion332 decks597 decks
4%synergy
Hallowed Fountain
55%inclusion327 decks597 decks
4%synergy
Underground River
54%inclusion321 decks597 decks
19%synergy
Exotic Orchard
51%inclusion306 decks597 decks
-8%synergy
Flooded Strand
45%inclusion267 decks597 decks
6%synergy
Polluted Delta
45%inclusion266 decks597 decks
6%synergy
Raffine's Tower
44%inclusion262 decks597 decks
3%synergy
Glacial Fortress
40%inclusion239 decks597 decks
-3%synergy
Isolated Chapel
40%inclusion239 decks597 decks
-2%synergy
Marsh Flats
38%inclusion229 decks597 decks
2%synergy
Drowned Catacomb
35%inclusion210 decks597 decks
-3%synergy
Sea of Clouds
34%inclusion202 decks597 decks
-1%synergy
Meticulous Archive
34%inclusion202 decks597 decks
20%synergy
Prairie Stream
34%inclusion200 decks597 decks
-7%synergy
Sunken Hollow
33%inclusion197 decks597 decks
-7%synergy
Undercity Sewers
32%inclusion194 decks597 decks
18%synergy
Shadowy Backstreet
32%inclusion189 decks597 decks
19%synergy
Vault of Champions
32%inclusion189 decks597 decks
-1%synergy
Valgavoth's Lair
31%inclusion186 decks597 decks
29%synergy
Morphic Pool
30%inclusion177 decks597 decks
-4%synergy
Floodfarm Verge
26%inclusion157 decks597 decks
15%synergy
Azorius Chancery
26%inclusion155 decks597 decks
13%synergy
Temple of Enlightenment
25%inclusion152 decks597 decks
10%synergy
Temple of Silence
25%inclusion151 decks597 decks
7%synergy
Terramorphic Expanse
25%inclusion147 decks597 decks
9%synergy
Evolving Wilds
24%inclusion145 decks597 decks
-0%synergy
Temple of Deceit
24%inclusion141 decks597 decks
7%synergy
Obscura Storefront
24%inclusion141 decks597 decks
14%synergy
Tainted Field
23%inclusion140 decks597 decks
17%synergy
Orzhov Basilica
23%inclusion137 decks597 decks
8%synergy
Deserted Beach
23%inclusion137 decks597 decks
2%synergy
Dimir Aqueduct
22%inclusion130 decks597 decks
9%synergy
Shipwreck Marsh
22%inclusion129 decks597 decks
1%synergy
Gloomlake Verge
22%inclusion129 decks597 decks
11%synergy
Tainted Isle
21%inclusion126 decks597 decks
15%synergy
Contaminated Landscape
20%inclusion119 decks597 decks
6%synergy
Shattered Sanctum
17%inclusion100 decks597 decks
-1%synergy
Ash Barrens
16%inclusion98 decks597 decks
6%synergy
Sink into Stupor
15%inclusion89 decks597 decks
2%synergy
Path of Ancestry
15%inclusion89 decks597 decks
-13%synergy
Fetid Heath
13%inclusion78 decks597 decks
-0%synergy
Fabled Passage
13%inclusion76 decks597 decks
5%synergy
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