The Master of Keys (Commander) - Upgraded

The Master of Keys
Rank #301
619decks
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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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Super Intelligence
3.3%inclusion4 decks121 decks
3%synergy
Archnemesis
1.9%inclusion2 decks106 decks
1%synergy
King T'Challa
1.6%inclusion2 decks126 decks
-1%synergy
Bilbo, Thief in the Night
1.1%inclusion2 decks182 decks
1%synergy
Kang Dynasty
0.9%inclusion1 decks106 decks
1%synergy
High Synergy Cards
Inquisitive Glimmer
78%inclusion482 decks619 decks
71%synergy
Ripples of Undeath
73%inclusion453 decks619 decks
70%synergy
Entity Tracker
69%inclusion426 decks619 decks
63%synergy
Starfield Mystic
66%inclusion410 decks619 decks
60%synergy
Animate Dead
67%inclusion416 decks619 decks
58%synergy
Gravebreaker Lamia
59%inclusion363 decks619 decks
58%synergy
Mesa Enchantress
66%inclusion408 decks619 decks
57%synergy
Demon of Fate's Design
60%inclusion369 decks619 decks
54%synergy
Hall of Heliod's Generosity
66%inclusion407 decks619 decks
53%synergy
Dress Down
53%inclusion330 decks619 decks
51%synergy
Top Cards
Doomwake Giant
55%inclusion343 decks619 decks
50%synergy
Fear of Sleep Paralysis
54%inclusion335 decks619 decks
49%synergy
Sphere of Safety
53%inclusion330 decks619 decks
44%synergy
Mystic Remora
53%inclusion327 decks619 decks
32%synergy
Swords to Plowshares
52%inclusion324 decks619 decks
-15%synergy
Scrabbling Skullcrab
52%inclusion321 decks619 decks
51%synergy
Necromancy
52%inclusion321 decks619 decks
47%synergy
Mirrormade
50%inclusion311 decks619 decks
40%synergy
Overlord of the Floodpits
49%inclusion306 decks619 decks
46%synergy
Amphibian Downpour
48%inclusion300 decks619 decks
44%synergy
Game Changers
Smothering Tithe
41%inclusion252 decks619 decks
11%synergy
Rhystic Study
30%inclusion188 decks619 decks
0%synergy
Enlightened Tutor
14%inclusion87 decks619 decks
-4%synergy
Gifts Ungiven
9.0%inclusion56 decks619 decks
6%synergy
Serra's Sanctum
6.8%inclusion42 decks619 decks
5%synergy
Necropotence
6.8%inclusion42 decks619 decks
0%synergy
Cyclonic Rift
6.3%inclusion39 decks619 decks
-16%synergy
Farewell
5.8%inclusion36 decks619 decks
-6%synergy
Demonic Tutor
5.8%inclusion36 decks619 decks
-14%synergy
Fierce Guardianship
5.8%inclusion36 decks619 decks
-14%synergy
Creatures
Overlord of the Balemurk
47%inclusion293 decks619 decks
46%synergy
Ondu Spiritdancer
46%inclusion282 decks619 decks
40%synergy
Victor, Valgavoth's Seneschal
44%inclusion271 decks619 decks
42%synergy
Zur, Eternal Schemer
44%inclusion270 decks619 decks
40%synergy
Fear of Impostors
43%inclusion264 decks619 decks
41%synergy
Silent Hallcreeper
33%inclusion205 decks619 decks
29%synergy
Zur the Enchanter
33%inclusion203 decks619 decks
28%synergy
Ghostly Dancers
28%inclusion176 decks619 decks
26%synergy
Enduring Curiosity
27%inclusion165 decks619 decks
19%synergy
Heliod, the Radiant Dawn
26%inclusion160 decks619 decks
22%synergy
Grim Guardian
24%inclusion151 decks619 decks
22%synergy
Soaring Lightbringer
23%inclusion142 decks619 decks
19%synergy
Moon-Blessed Cleric
23%inclusion141 decks619 decks
18%synergy
Archon of Sun's Grace
21%inclusion133 decks619 decks
17%synergy
Sage of Mysteries
20%inclusion121 decks619 decks
19%synergy
Abdel Adrian, Gorion's Ward
19%inclusion115 decks619 decks
17%synergy
Aminatou, Veil Piercer
17%inclusion108 decks619 decks
16%synergy
Overlord of the Mistmoors
16%inclusion101 decks619 decks
14%synergy
Hedron Crab
15%inclusion92 decks619 decks
14%synergy
Eiganjo Dynastorian
15%inclusion32 decks217 decks
13%synergy
Lotho, Corrupt Shirriff
15%inclusion90 decks619 decks
-3%synergy
Mindwrack Harpy
14%inclusion88 decks619 decks
14%synergy
Alseid of Life's Bounty
14%inclusion86 decks619 decks
13%synergy
Athreos, Shroud-Veiled
13%inclusion83 decks619 decks
9%synergy
Esper Sentinel
12%inclusion75 decks619 decks
-15%synergy
Archetype of Imagination
12%inclusion74 decks619 decks
7%synergy
Balemurk Leech
12%inclusion74 decks619 decks
11%synergy
Witch Enchanter
12%inclusion72 decks619 decks
4%synergy
Ancient Cellarspawn
11%inclusion70 decks619 decks
9%synergy
Hullbreaker Horror
11%inclusion69 decks619 decks
5%synergy
Skullsnap Nuisance
10%inclusion64 decks619 decks
10%synergy
Ledger Shredder
10%inclusion63 decks619 decks
2%synergy
Spirited Companion
9.4%inclusion58 decks619 decks
8%synergy
Gremlin Tamer
9.0%inclusion56 decks619 decks
8%synergy
Nashi, Searcher in the Dark
8.9%inclusion55 decks619 decks
8%synergy
Sun Titan
8.7%inclusion54 decks619 decks
1%synergy
Summon: Yojimbo
7.9%inclusion40 decks504 decks
7%synergy
Grand Abolisher
7.8%inclusion48 decks619 decks
-7%synergy
Stenn, Paranoid Partisan
7.4%inclusion46 decks619 decks
6%synergy
Lurrus of the Dream-Den
7.3%inclusion45 decks619 decks
6%synergy
Auramancer
6.9%inclusion43 decks619 decks
4%synergy
Laboratory Maniac
6.9%inclusion43 decks619 decks
4%synergy
Emet-Selch of the Third Seat
6.7%inclusion34 decks507 decks
-3%synergy
Summon: Bahamut
6.7%inclusion34 decks507 decks
5%synergy
Starnheim Courser
6.6%inclusion41 decks619 decks
3%synergy
Nightmare Shepherd
6.6%inclusion41 decks619 decks
4%synergy
Valley Floodcaller
6.5%inclusion40 decks619 decks
3%synergy
Solemn Simulacrum
6.3%inclusion39 decks619 decks
-7%synergy
Stitcher's Supplier
6.1%inclusion38 decks619 decks
5%synergy
Fear of Infinity
6.0%inclusion37 decks619 decks
5%synergy
Instants
Counterspell
37%inclusion230 decks619 decks
-5%synergy
Arcane Denial
32%inclusion200 decks619 decks
12%synergy
Entomb
30%inclusion184 decks619 decks
23%synergy
An Offer You Can't Refuse
28%inclusion171 decks619 decks
-0%synergy
Path to Exile
27%inclusion170 decks619 decks
-15%synergy
Dark Ritual
25%inclusion153 decks619 decks
4%synergy
Void Rend
18%inclusion114 decks619 decks
-16%synergy
Swan Song
18%inclusion111 decks619 decks
-2%synergy
Dovin's Veto
17%inclusion103 decks619 decks
-10%synergy
Frantic Search
16%inclusion99 decks619 decks
-3%synergy
Inkshield
16%inclusion98 decks619 decks
6%synergy
Sink into Stupor
15%inclusion95 decks619 decks
2%synergy
Thirst for Meaning
15%inclusion93 decks619 decks
14%synergy
Mana Drain
13%inclusion83 decks619 decks
-4%synergy
Otherworldly Gaze
13%inclusion80 decks619 decks
11%synergy
Fell the Profane
12%inclusion75 decks619 decks
3%synergy
Negate
12%inclusion75 decks619 decks
-4%synergy
Anguished Unmaking
10%inclusion64 decks619 decks
-16%synergy
Brainstorm
10%inclusion63 decks619 decks
-7%synergy
Fact or Fiction
6.9%inclusion43 decks619 decks
3%synergy
Waterlogged Teachings
6.1%inclusion38 decks619 decks
1%synergy
Cabal Ritual
5.5%inclusion34 decks619 decks
2%synergy
Utter End
5.5%inclusion34 decks619 decks
-1%synergy
Faithful Mending
5.2%inclusion32 decks619 decks
2%synergy
Generous Gift
5.0%inclusion31 decks619 decks
-9%synergy
Sorceries
Sevinne's Reclamation
44%inclusion273 decks619 decks
35%synergy
Redress Fate
34%inclusion212 decks619 decks
29%synergy
Windfall
25%inclusion156 decks619 decks
12%synergy
Reanimate
21%inclusion132 decks619 decks
5%synergy
Singularity Rupture
19%inclusion90 decks462 decks
17%synergy
Extinguish All Hope
18%inclusion114 decks619 decks
17%synergy
Dance of the Manse
18%inclusion110 decks619 decks
15%synergy
Idyllic Tutor
15%inclusion95 decks619 decks
11%synergy
Glimpse the Unthinkable
15%inclusion92 decks619 decks
14%synergy
Toxic Deluge
14%inclusion88 decks619 decks
-6%synergy
Damn
13%inclusion80 decks619 decks
-7%synergy
Time Wipe
12%inclusion77 decks619 decks
6%synergy
Supreme Verdict
12%inclusion72 decks619 decks
-3%synergy
Resurgent Belief
12%inclusion72 decks619 decks
10%synergy
Replenish
10%inclusion63 decks619 decks
8%synergy
Space-Time Anomaly
10%inclusion44 decks457 decks
8%synergy
Buried Alive
9.4%inclusion58 decks619 decks
5%synergy
Demonic Counsel
8.6%inclusion53 decks619 decks
8%synergy
Ponder
7.1%inclusion44 decks619 decks
-2%synergy
Unmarked Grave
7.1%inclusion44 decks619 decks
6%synergy
Austere Command
6.6%inclusion41 decks619 decks
-2%synergy
Lively Dirge
6.5%inclusion40 decks619 decks
5%synergy
Utility Artifacts
Mesmeric Orb
20%inclusion124 decks619 decks
19%synergy
Cloud Key
13%inclusion78 decks619 decks
9%synergy
Lightning Greaves
7.8%inclusion48 decks619 decks
-15%synergy
Wayfarer's Bauble
6.6%inclusion41 decks619 decks
-0%synergy
Swiftfoot Boots
5.3%inclusion33 decks619 decks
-19%synergy
Enchantments
Secret Arcade // Dusty Parlor
48%inclusion300 decks619 decks
44%synergy
Propaganda
46%inclusion284 decks619 decks
16%synergy
Grasp of Fate
43%inclusion268 decks619 decks
37%synergy
Seal of Cleansing
43%inclusion264 decks619 decks
41%synergy
Sigil of the Empty Throne
41%inclusion255 decks619 decks
36%synergy
Ghostly Prison
40%inclusion248 decks619 decks
17%synergy
Cemetery Tampering
38%inclusion238 decks619 decks
38%synergy
Starfield of Nyx
37%inclusion228 decks619 decks
33%synergy
Estrid's Invocation
37%inclusion228 decks619 decks
32%synergy
Blind Obedience
34%inclusion209 decks619 decks
22%synergy
Cacophony Unleashed
32%inclusion196 decks619 decks
30%synergy
Monologue Tax
31%inclusion194 decks619 decks
25%synergy
Dance of the Dead
29%inclusion182 decks619 decks
27%synergy
Seal of Removal
24%inclusion150 decks619 decks
24%synergy
Darksteel Mutation
24%inclusion149 decks619 decks
18%synergy
The Tale of Tamiyo
24%inclusion149 decks619 decks
24%synergy
Greater Auramancy
23%inclusion140 decks619 decks
18%synergy
The Meathook Massacre
22%inclusion138 decks619 decks
19%synergy
Stillness in Motion
22%inclusion124 decks560 decks
22%synergy
Imprisoned in the Moon
21%inclusion133 decks619 decks
15%synergy
Phyrexian Arena
21%inclusion133 decks619 decks
7%synergy
All That Glitters
21%inclusion129 decks619 decks
13%synergy
Black Market Connections
21%inclusion129 decks619 decks
6%synergy
Shark Typhoon
21%inclusion128 decks619 decks
15%synergy
Timely Ward
21%inclusion128 decks619 decks
16%synergy
Sheltered by Ghosts
20%inclusion125 decks619 decks
18%synergy
Defiled Crypt // Cadaver Lab
20%inclusion124 decks619 decks
19%synergy
Copy Enchantment
20%inclusion122 decks619 decks
15%synergy
Polluted Cistern // Dim Oubliette
20%inclusion121 decks619 decks
19%synergy
Out of the Tombs
19%inclusion119 decks619 decks
19%synergy
Ethereal Armor
19%inclusion119 decks619 decks
15%synergy
Extravagant Replication
19%inclusion118 decks619 decks
14%synergy
Leyline of Anticipation
17%inclusion107 decks619 decks
13%synergy
Hallowed Haunting
17%inclusion107 decks619 decks
15%synergy
Authority of the Consuls
17%inclusion105 decks619 decks
3%synergy
Touch the Spirit Realm
16%inclusion102 decks619 decks
14%synergy
The Eldest Reborn
15%inclusion95 decks619 decks
13%synergy
Land Tax
15%inclusion95 decks619 decks
9%synergy
Teval's Judgment
15%inclusion85 decks566 decks
14%synergy
Court of Cunning
15%inclusion92 decks619 decks
14%synergy
Secrets of the Dead
15%inclusion91 decks619 decks
14%synergy
Bottomless Pool // Locker Room
15%inclusion90 decks619 decks
13%synergy
Mirror Room // Fractured Realm
15%inclusion90 decks619 decks
12%synergy
Restricted Office // Lecture Hall
14%inclusion89 decks619 decks
12%synergy
Static Prison
14%inclusion88 decks619 decks
14%synergy
Central Elevator // Promising Stairs
13%inclusion81 decks619 decks
12%synergy
Oubliette
13%inclusion81 decks619 decks
12%synergy
Nowhere to Run
13%inclusion80 decks619 decks
12%synergy
One with the Multiverse
13%inclusion79 decks619 decks
8%synergy
Aura of Silence
12%inclusion76 decks619 decks
9%synergy
Battles
Invasion of Theros
6.3%inclusion39 decks619 decks
5%synergy
Utility Lands
Bojuka Bog
46%inclusion282 decks619 decks
19%synergy
Otawara, Soaring City
18%inclusion110 decks619 decks
-1%synergy
Cephalid Coliseum
18%inclusion109 decks619 decks
14%synergy
Takenuma, Abandoned Mire
16%inclusion102 decks619 decks
10%synergy
Reliquary Tower
13%inclusion82 decks619 decks
-21%synergy
Halimar Depths
10%inclusion64 decks619 decks
6%synergy
Urborg, Tomb of Yawgmoth
6.9%inclusion43 decks619 decks
-6%synergy
Urza's Saga
6.8%inclusion42 decks619 decks
-5%synergy
Adagia, Windswept Bastion
6.5%inclusion30 decks462 decks
4%synergy
Eiganjo, Seat of the Empire
5.0%inclusion31 decks619 decks
0%synergy
Mana Artifacts
Sol Ring
88%inclusion542 decks619 decks
-2%synergy
Arcane Signet
86%inclusion535 decks619 decks
-1%synergy
Talisman of Progress
52%inclusion324 decks619 decks
8%synergy
Talisman of Dominance
52%inclusion321 decks619 decks
2%synergy
Talisman of Hierarchy
47%inclusion294 decks619 decks
2%synergy
Azorius Signet
39%inclusion244 decks619 decks
10%synergy
Orzhov Signet
38%inclusion234 decks619 decks
7%synergy
Fellwar Stone
32%inclusion199 decks619 decks
-1%synergy
Dimir Signet
28%inclusion173 decks619 decks
-2%synergy
Mind Stone
14%inclusion85 decks619 decks
2%synergy
Commander's Sphere
12%inclusion72 decks619 decks
-5%synergy
Chromatic Lantern
5.2%inclusion32 decks619 decks
-7%synergy
Lands
Swamp
97%inclusion599 decks619 decks
5%synergy
Island
97%inclusion599 decks619 decks
4%synergy
Plains
95%inclusion591 decks619 decks
3%synergy
Command Tower
95%inclusion590 decks619 decks
3%synergy
Caves of Koilos
62%inclusion381 decks619 decks
26%synergy
Arcane Sanctum
59%inclusion364 decks619 decks
5%synergy
Adarkar Wastes
58%inclusion361 decks619 decks
25%synergy
Godless Shrine
58%inclusion356 decks619 decks
6%synergy
Watery Grave
57%inclusion353 decks619 decks
6%synergy
Hallowed Fountain
56%inclusion346 decks619 decks
5%synergy
Underground River
54%inclusion334 decks619 decks
19%synergy
Exotic Orchard
52%inclusion324 decks619 decks
-7%synergy
Flooded Strand
46%inclusion285 decks619 decks
7%synergy
Polluted Delta
46%inclusion285 decks619 decks
8%synergy
Raffine's Tower
44%inclusion275 decks619 decks
4%synergy
Glacial Fortress
41%inclusion251 decks619 decks
-3%synergy
Isolated Chapel
40%inclusion249 decks619 decks
-2%synergy
Marsh Flats
40%inclusion246 decks619 decks
4%synergy
Drowned Catacomb
36%inclusion224 decks619 decks
-3%synergy
Meticulous Archive
35%inclusion217 decks619 decks
21%synergy
Sea of Clouds
35%inclusion216 decks619 decks
0%synergy
Undercity Sewers
34%inclusion211 decks619 decks
19%synergy
Prairie Stream
33%inclusion206 decks619 decks
-7%synergy
Shadowy Backstreet
33%inclusion204 decks619 decks
20%synergy
Vault of Champions
33%inclusion203 decks619 decks
1%synergy
Sunken Hollow
32%inclusion200 decks619 decks
-7%synergy
Valgavoth's Lair
32%inclusion195 decks619 decks
29%synergy
Morphic Pool
31%inclusion189 decks619 decks
-3%synergy
Floodfarm Verge
26%inclusion158 decks619 decks
14%synergy
Azorius Chancery
25%inclusion157 decks619 decks
12%synergy
Temple of Enlightenment
25%inclusion152 decks619 decks
9%synergy
Temple of Silence
24%inclusion151 decks619 decks
6%synergy
Terramorphic Expanse
24%inclusion148 decks619 decks
8%synergy
Evolving Wilds
24%inclusion147 decks619 decks
-0%synergy
Deserted Beach
23%inclusion145 decks619 decks
3%synergy
Tainted Field
23%inclusion141 decks619 decks
16%synergy
Temple of Deceit
23%inclusion140 decks619 decks
6%synergy
Orzhov Basilica
23%inclusion140 decks619 decks
8%synergy
Obscura Storefront
22%inclusion139 decks619 decks
13%synergy
Shipwreck Marsh
22%inclusion137 decks619 decks
2%synergy
Gloomlake Verge
21%inclusion132 decks619 decks
10%synergy
Dimir Aqueduct
21%inclusion131 decks619 decks
9%synergy
Tainted Isle
21%inclusion127 decks619 decks
14%synergy
Contaminated Landscape
19%inclusion118 decks619 decks
6%synergy
Shattered Sanctum
17%inclusion105 decks619 decks
-1%synergy
Ash Barrens
16%inclusion100 decks619 decks
5%synergy
Sink into Stupor
15%inclusion95 decks619 decks
2%synergy
Path of Ancestry
14%inclusion89 decks619 decks
-14%synergy
Fabled Passage
13%inclusion78 decks619 decks
5%synergy
Fetid Heath
13%inclusion78 decks619 decks
-1%synergy
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