The Master of Keys (Commander) - Core

The Master of Keys
Rank #302
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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
Lands
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Eiganjo Dynastorian
13%inclusion7 decks54 decks
12%synergy
Primary Research
9.3%inclusion5 decks54 decks
9%synergy
Killian, Decisive Mentor
4.1%inclusion4 decks97 decks
3%synergy
Grave Researcher
3.7%inclusion2 decks54 decks
1%synergy
Changing Loyalty
3.7%inclusion2 decks54 decks
3%synergy
High Synergy Cards
Inquisitive Glimmer
77%inclusion335 decks436 decks
70%synergy
Mesa Enchantress
74%inclusion321 decks436 decks
65%synergy
Starfield Mystic
69%inclusion302 decks436 decks
63%synergy
Entity Tracker
64%inclusion281 decks436 decks
58%synergy
Demon of Fate's Design
63%inclusion274 decks436 decks
57%synergy
Doomwake Giant
60%inclusion263 decks436 decks
55%synergy
Gravebreaker Lamia
51%inclusion224 decks436 decks
50%synergy
Ripples of Undeath
53%inclusion231 decks436 decks
50%synergy
Fear of Sleep Paralysis
55%inclusion241 decks436 decks
50%synergy
Scrabbling Skullcrab
49%inclusion212 decks436 decks
48%synergy
Top Cards
Secret Arcade // Dusty Parlor
50%inclusion220 decks436 decks
46%synergy
Ondu Spiritdancer
50%inclusion218 decks436 decks
44%synergy
Sigil of the Empty Throne
50%inclusion217 decks436 decks
44%synergy
Swords to Plowshares
49%inclusion212 decks436 decks
-19%synergy
Mirrormade
48%inclusion211 decks436 decks
39%synergy
Sphere of Safety
48%inclusion208 decks436 decks
38%synergy
Victor, Valgavoth's Seneschal
47%inclusion204 decks436 decks
45%synergy
Redress Fate
43%inclusion187 decks436 decks
38%synergy
Fear of Impostors
42%inclusion182 decks436 decks
40%synergy
Animate Dead
41%inclusion179 decks436 decks
32%synergy
Creatures
Overlord of the Floodpits
39%inclusion170 decks436 decks
36%synergy
Soaring Lightbringer
38%inclusion164 decks436 decks
33%synergy
Ghostly Dancers
37%inclusion162 decks436 decks
35%synergy
Overlord of the Balemurk
35%inclusion151 decks436 decks
33%synergy
Moon-Blessed Cleric
31%inclusion133 decks436 decks
26%synergy
Aminatou, Veil Piercer
31%inclusion133 decks436 decks
29%synergy
Silent Hallcreeper
31%inclusion133 decks436 decks
26%synergy
Zur, Eternal Schemer
30%inclusion132 decks436 decks
27%synergy
Heliod, the Radiant Dawn
28%inclusion124 decks436 decks
25%synergy
Archon of Sun's Grace
28%inclusion121 decks436 decks
23%synergy
Grim Guardian
28%inclusion120 decks436 decks
25%synergy
Enduring Curiosity
27%inclusion116 decks436 decks
19%synergy
Athreos, Shroud-Veiled
25%inclusion107 decks436 decks
20%synergy
Zur the Enchanter
22%inclusion98 decks436 decks
17%synergy
Skullsnap Nuisance
22%inclusion94 decks436 decks
21%synergy
Archetype of Imagination
21%inclusion92 decks436 decks
16%synergy
Mindwrack Harpy
21%inclusion90 decks436 decks
20%synergy
Sage of Mysteries
20%inclusion88 decks436 decks
20%synergy
Ancient Cellarspawn
19%inclusion85 decks436 decks
17%synergy
Alseid of Life's Bounty
19%inclusion82 decks436 decks
17%synergy
Overlord of the Mistmoors
17%inclusion76 decks436 decks
15%synergy
Balemurk Leech
16%inclusion71 decks436 decks
16%synergy
Nightmare Shepherd
15%inclusion66 decks436 decks
13%synergy
Spirited Companion
14%inclusion62 decks436 decks
12%synergy
Gremlin Tamer
14%inclusion61 decks436 decks
13%synergy
Auramancer
13%inclusion58 decks436 decks
10%synergy
Fear of Infinity
13%inclusion55 decks436 decks
12%synergy
Nashi, Searcher in the Dark
13%inclusion55 decks436 decks
12%synergy
Solemn Simulacrum
12%inclusion54 decks436 decks
-1%synergy
Summon: Yojimbo
12%inclusion25 decks207 decks
11%synergy
Starnheim Courser
10%inclusion45 decks436 decks
7%synergy
Millikin
9.4%inclusion41 decks436 decks
9%synergy
Metamorphosis Fanatic
8.7%inclusion38 decks436 decks
4%synergy
Fear of Surveillance
8.5%inclusion37 decks436 decks
8%synergy
Arvinox, the Mind Flail
8.5%inclusion37 decks436 decks
7%synergy
Creeping Peeper
8.0%inclusion35 decks436 decks
8%synergy
Sun Titan
7.3%inclusion32 decks436 decks
-1%synergy
Enduring Innocence
7.1%inclusion31 decks436 decks
6%synergy
Deranged Assistant
7.1%inclusion31 decks436 decks
7%synergy
Stenn, Paranoid Partisan
6.9%inclusion30 decks436 decks
6%synergy
Hedron Crab
6.9%inclusion30 decks436 decks
6%synergy
Appendage Amalgam
6.9%inclusion30 decks436 decks
7%synergy
Fear of Failed Tests
6.4%inclusion28 decks436 decks
6%synergy
Phenomenon Investigators
6.4%inclusion28 decks436 decks
6%synergy
Stitcher's Supplier
6.4%inclusion28 decks436 decks
6%synergy
Witch Enchanter
6.2%inclusion27 decks436 decks
-1%synergy
Burnished Hart
6.2%inclusion27 decks436 decks
3%synergy
Ghostly Keybearer
6.0%inclusion26 decks436 decks
6%synergy
Enduring Tenacity
6.0%inclusion26 decks436 decks
-2%synergy
Summon: Primal Odin
5.8%inclusion12 decks207 decks
1%synergy
Instants
Arcane Denial
33%inclusion146 decks436 decks
13%synergy
Thirst for Meaning
28%inclusion124 decks436 decks
27%synergy
Path to Exile
27%inclusion117 decks436 decks
-15%synergy
Otherworldly Gaze
24%inclusion104 decks436 decks
22%synergy
Counterspell
23%inclusion102 decks436 decks
-19%synergy
Void Rend
21%inclusion90 decks436 decks
-14%synergy
Inkshield
20%inclusion88 decks436 decks
10%synergy
Frantic Search
17%inclusion75 decks436 decks
-1%synergy
An Offer You Can't Refuse
15%inclusion66 decks436 decks
-12%synergy
Utter End
14%inclusion63 decks436 decks
8%synergy
Negate
14%inclusion61 decks436 decks
-2%synergy
Brainstorm
12%inclusion52 decks436 decks
-5%synergy
Dovin's Veto
10%inclusion44 decks436 decks
-16%synergy
Dark Ritual
10%inclusion42 decks436 decks
-10%synergy
Return to Dust
9.2%inclusion40 decks436 decks
6%synergy
Generous Gift
7.8%inclusion34 decks436 decks
-6%synergy
Fell the Profane
7.3%inclusion32 decks436 decks
-2%synergy
Sink into Stupor
7.1%inclusion31 decks436 decks
-6%synergy
Fact or Fiction
6.7%inclusion29 decks436 decks
3%synergy
Entomb
6.7%inclusion29 decks436 decks
0%synergy
Swan Song
6.7%inclusion29 decks436 decks
-13%synergy
Anguished Unmaking
5.7%inclusion25 decks436 decks
-20%synergy
Unwanted Remake
5.5%inclusion24 decks436 decks
5%synergy
Telling Time
5.3%inclusion23 decks436 decks
3%synergy
Faithful Mending
5.0%inclusion22 decks436 decks
1%synergy
Sorceries
Sevinne's Reclamation
31%inclusion133 decks436 decks
22%synergy
Extinguish All Hope
24%inclusion106 decks436 decks
23%synergy
Time Wipe
24%inclusion104 decks436 decks
17%synergy
Dance of the Manse
22%inclusion97 decks436 decks
19%synergy
Singularity Rupture
19%inclusion33 decks178 decks
16%synergy
Windfall
16%inclusion68 decks436 decks
2%synergy
Resurgent Belief
13%inclusion55 decks436 decks
11%synergy
Glimpse the Unthinkable
11%inclusion50 decks436 decks
11%synergy
Damn
11%inclusion49 decks436 decks
-9%synergy
Reanimate
11%inclusion48 decks436 decks
-5%synergy
Space-Time Anomaly
10%inclusion18 decks176 decks
9%synergy
Terminus
10%inclusion42 decks436 decks
6%synergy
Ponder
9.2%inclusion40 decks436 decks
0%synergy
Brilliant Restoration
8.3%inclusion36 decks436 decks
7%synergy
Read the Bones
8.0%inclusion35 decks436 decks
4%synergy
Toxic Deluge
6.7%inclusion29 decks436 decks
-13%synergy
Idyllic Tutor
5.7%inclusion25 decks436 decks
2%synergy
Portent
5.7%inclusion25 decks436 decks
2%synergy
Diabolic Vision
5.5%inclusion24 decks436 decks
3%synergy
Open the Vaults
5.3%inclusion23 decks436 decks
4%synergy
Commune with Evil
5.0%inclusion22 decks436 decks
5%synergy
Austere Command
5.0%inclusion22 decks436 decks
-3%synergy
Utility Artifacts
Cloud Key
12%inclusion52 decks436 decks
9%synergy
Keys to the House
9.2%inclusion40 decks436 decks
9%synergy
Wayfarer's Bauble
8.7%inclusion38 decks436 decks
1%synergy
Lightning Greaves
8.3%inclusion36 decks436 decks
-15%synergy
Mesmeric Orb
7.6%inclusion33 decks436 decks
6%synergy
Whip of Erebos
5.5%inclusion24 decks436 decks
3%synergy
Swiftfoot Boots
5.5%inclusion24 decks436 decks
-19%synergy
Perpetual Timepiece
5.3%inclusion23 decks436 decks
5%synergy
Enchantments
Seal of Cleansing
40%inclusion175 decks436 decks
39%synergy
Grasp of Fate
40%inclusion173 decks436 decks
34%synergy
Dress Down
39%inclusion172 decks436 decks
37%synergy
Cemetery Tampering
38%inclusion166 decks436 decks
37%synergy
Defiled Crypt // Cadaver Lab
36%inclusion158 decks436 decks
36%synergy
Monologue Tax
36%inclusion157 decks436 decks
30%synergy
Cacophony Unleashed
35%inclusion154 decks436 decks
34%synergy
Propaganda
34%inclusion147 decks436 decks
5%synergy
Shark Typhoon
32%inclusion141 decks436 decks
27%synergy
Estrid's Invocation
31%inclusion134 decks436 decks
26%synergy
Ethereal Armor
30%inclusion131 decks436 decks
25%synergy
Bottomless Pool // Locker Room
30%inclusion129 decks436 decks
28%synergy
Timely Ward
29%inclusion127 decks436 decks
24%synergy
Amphibian Downpour
29%inclusion127 decks436 decks
25%synergy
Extravagant Replication
28%inclusion122 decks436 decks
23%synergy
All That Glitters
28%inclusion122 decks436 decks
20%synergy
Ghostly Prison
26%inclusion115 decks436 decks
4%synergy
Necromancy
26%inclusion113 decks436 decks
21%synergy
Polluted Cistern // Dim Oubliette
25%inclusion111 decks436 decks
25%synergy
Cramped Vents // Access Maze
25%inclusion109 decks436 decks
23%synergy
The Eldest Reborn
25%inclusion109 decks436 decks
23%synergy
Stillness in Motion
25%inclusion58 decks233 decks
24%synergy
Mystic Remora
24%inclusion104 decks436 decks
3%synergy
Darksteel Mutation
23%inclusion101 decks436 decks
17%synergy
The Tale of Tamiyo
23%inclusion99 decks436 decks
22%synergy
Restricted Office // Lecture Hall
22%inclusion96 decks436 decks
20%synergy
Starfield of Nyx
22%inclusion95 decks436 decks
18%synergy
Mirror Room // Fractured Realm
22%inclusion94 decks436 decks
19%synergy
Sheltered by Ghosts
21%inclusion92 decks436 decks
18%synergy
Central Elevator // Promising Stairs
19%inclusion82 decks436 decks
18%synergy
Seal of Removal
19%inclusion82 decks436 decks
18%synergy
Imprisoned in the Moon
19%inclusion81 decks436 decks
12%synergy
Secrets of the Dead
18%inclusion80 decks436 decks
18%synergy
Blind Obedience
18%inclusion77 decks436 decks
6%synergy
One with the Multiverse
17%inclusion76 decks436 decks
13%synergy
Hallowed Haunting
17%inclusion76 decks436 decks
15%synergy
Derelict Attic // Widow's Walk
17%inclusion75 decks435 decks
17%synergy
Phyrexian Arena
17%inclusion74 decks436 decks
3%synergy
Dazzling Theater // Prop Room
17%inclusion72 decks436 decks
15%synergy
Cast Out
16%inclusion70 decks436 decks
13%synergy
Copy Enchantment
16%inclusion70 decks436 decks
11%synergy
Meat Locker // Drowned Diner
16%inclusion69 decks435 decks
15%synergy
Unable to Scream
15%inclusion66 decks436 decks
14%synergy
Underwater Tunnel // Slimy Aquarium
15%inclusion65 decks436 decks
15%synergy
Teval's Judgment
14%inclusion34 decks236 decks
14%synergy
Nowhere to Run
14%inclusion60 decks436 decks
13%synergy
Court of Cunning
14%inclusion59 decks436 decks
13%synergy
Surgical Suite // Hospital Room
14%inclusion59 decks436 decks
13%synergy
Spirit-Sister's Call
14%inclusion59 decks436 decks
12%synergy
Funeral Room // Awakening Hall
13%inclusion57 decks436 decks
12%synergy
Battles
Invasion of Theros
11%inclusion47 decks436 decks
9%synergy
Utility Lands
Hall of Heliod's Generosity
57%inclusion249 decks436 decks
44%synergy
Bojuka Bog
47%inclusion207 decks436 decks
21%synergy
Halimar Depths
18%inclusion79 decks436 decks
14%synergy
Reliquary Tower
10%inclusion45 decks436 decks
-24%synergy
Cephalid Coliseum
8.5%inclusion37 decks436 decks
5%synergy
Takenuma, Abandoned Mire
6.4%inclusion28 decks436 decks
0%synergy
Nephalia Drownyard
6.2%inclusion27 decks436 decks
6%synergy
Otawara, Soaring City
6.2%inclusion27 decks436 decks
-13%synergy
Adagia, Windswept Bastion
5.1%inclusion9 decks178 decks
3%synergy
Mana Artifacts
Arcane Signet
87%inclusion379 decks436 decks
-1%synergy
Sol Ring
78%inclusion342 decks436 decks
-11%synergy
Azorius Signet
53%inclusion231 decks436 decks
23%synergy
Orzhov Signet
49%inclusion215 decks436 decks
18%synergy
Talisman of Dominance
40%inclusion175 decks436 decks
-10%synergy
Talisman of Progress
39%inclusion170 decks436 decks
-5%synergy
Talisman of Hierarchy
34%inclusion150 decks436 decks
-10%synergy
Dimir Signet
34%inclusion149 decks436 decks
4%synergy
Fellwar Stone
24%inclusion106 decks436 decks
-9%synergy
Commander's Sphere
24%inclusion103 decks436 decks
6%synergy
Mind Stone
23%inclusion101 decks436 decks
11%synergy
Chromatic Lantern
7.6%inclusion33 decks436 decks
-5%synergy
Lands
Island
99%inclusion431 decks436 decks
6%synergy
Plains
97%inclusion424 decks436 decks
5%synergy
Swamp
97%inclusion421 decks436 decks
5%synergy
Command Tower
93%inclusion407 decks436 decks
1%synergy
Arcane Sanctum
71%inclusion309 decks436 decks
17%synergy
Adarkar Wastes
61%inclusion268 decks436 decks
29%synergy
Caves of Koilos
61%inclusion267 decks436 decks
26%synergy
Underground River
54%inclusion236 decks436 decks
19%synergy
Exotic Orchard
49%inclusion214 decks436 decks
-10%synergy
Obscura Storefront
43%inclusion187 decks436 decks
34%synergy
Terramorphic Expanse
41%inclusion180 decks436 decks
26%synergy
Evolving Wilds
41%inclusion180 decks436 decks
17%synergy
Temple of Enlightenment
41%inclusion178 decks436 decks
25%synergy
Temple of Silence
39%inclusion171 decks436 decks
21%synergy
Glacial Fortress
39%inclusion170 decks436 decks
-4%synergy
Temple of Deceit
38%inclusion165 decks436 decks
21%synergy
Prairie Stream
37%inclusion160 decks436 decks
-4%synergy
Isolated Chapel
37%inclusion160 decks436 decks
-5%synergy
Dimir Aqueduct
36%inclusion156 decks436 decks
23%synergy
Azorius Chancery
36%inclusion155 decks436 decks
22%synergy
Tainted Field
33%inclusion146 decks436 decks
27%synergy
Sunken Hollow
33%inclusion146 decks436 decks
-6%synergy
Contaminated Landscape
33%inclusion143 decks436 decks
19%synergy
Drowned Catacomb
33%inclusion143 decks436 decks
-5%synergy
Tainted Isle
31%inclusion137 decks436 decks
25%synergy
Orzhov Basilica
31%inclusion137 decks436 decks
17%synergy
Valgavoth's Lair
31%inclusion133 decks436 decks
28%synergy
Godless Shrine
27%inclusion119 decks436 decks
-24%synergy
Watery Grave
27%inclusion118 decks436 decks
-24%synergy
Hallowed Fountain
27%inclusion116 decks436 decks
-24%synergy
Raffine's Tower
26%inclusion115 decks436 decks
-14%synergy
Ash Barrens
26%inclusion112 decks436 decks
15%synergy
Flooded Strand
20%inclusion88 decks436 decks
-18%synergy
Meticulous Archive
20%inclusion86 decks436 decks
6%synergy
Shadowy Backstreet
19%inclusion85 decks436 decks
7%synergy
Polluted Delta
19%inclusion84 decks436 decks
-19%synergy
Undercity Sewers
19%inclusion83 decks436 decks
4%synergy
Sea of Clouds
18%inclusion80 decks436 decks
-17%synergy
Gloomlake Verge
17%inclusion76 decks436 decks
6%synergy
Vault of Champions
17%inclusion75 decks436 decks
-15%synergy
Floodfarm Verge
17%inclusion75 decks436 decks
6%synergy
Marsh Flats
17%inclusion74 decks436 decks
-19%synergy
Shipwreck Marsh
16%inclusion68 decks436 decks
-5%synergy
Morphic Pool
15%inclusion67 decks436 decks
-18%synergy
Skycloud Expanse
15%inclusion65 decks436 decks
0%synergy
Deserted Beach
15%inclusion64 decks436 decks
-6%synergy
Darkwater Catacombs
14%inclusion62 decks436 decks
-1%synergy
Thriving Isle
14%inclusion61 decks436 decks
10%synergy
Thriving Moor
14%inclusion61 decks436 decks
10%synergy
Thriving Heath
14%inclusion60 decks436 decks
10%synergy
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