The Master of Keys (Commander) - Core Control

The Master of Keys
Rank #301
15decks
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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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Battles
Utility Lands
Mana Artifacts
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Entity Tracker
87%inclusion13 decks15 decks
81%synergy
Inquisitive Glimmer
80%inclusion12 decks15 decks
73%synergy
Seal of Cleansing
67%inclusion10 decks15 decks
65%synergy
Fear of Sleep Paralysis
67%inclusion10 decks15 decks
62%synergy
Stillness in Motion
62%inclusion8 decks13 decks
61%synergy
Doomwake Giant
67%inclusion10 decks15 decks
61%synergy
Fear of Impostors
60%inclusion9 decks15 decks
59%synergy
Mesa Enchantress
67%inclusion10 decks15 decks
58%synergy
Ripples of Undeath
60%inclusion9 decks15 decks
57%synergy
Starfield Mystic
60%inclusion9 decks15 decks
54%synergy
Top Cards
Propaganda
60%inclusion9 decks15 decks
31%synergy
Scrabbling Skullcrab
53%inclusion8 decks15 decks
52%synergy
Grasp of Fate
53%inclusion8 decks15 decks
47%synergy
Gravebreaker Lamia
53%inclusion8 decks15 decks
52%synergy
Sage of Mysteries
53%inclusion8 decks15 decks
53%synergy
Victor, Valgavoth's Seneschal
53%inclusion8 decks15 decks
51%synergy
Amphibian Downpour
53%inclusion8 decks15 decks
49%synergy
Sevinne's Reclamation
47%inclusion7 decks15 decks
38%synergy
Imprisoned in the Moon
47%inclusion7 decks15 decks
40%synergy
Sigil of the Empty Throne
47%inclusion7 decks15 decks
41%synergy
Game Changers
Thassa's Oracle
6.7%inclusion1 decks15 decks
-2%synergy
Creatures
Demon of Fate's Design
47%inclusion7 decks15 decks
41%synergy
Zur, Eternal Schemer
47%inclusion7 decks15 decks
43%synergy
Ondu Spiritdancer
47%inclusion7 decks15 decks
41%synergy
Mindwrack Harpy
47%inclusion7 decks15 decks
46%synergy
Zur the Enchanter
40%inclusion6 decks15 decks
35%synergy
Grim Guardian
40%inclusion6 decks15 decks
38%synergy
Overlord of the Floodpits
33%inclusion5 decks15 decks
30%synergy
Aminatou, Veil Piercer
33%inclusion5 decks15 decks
32%synergy
Heliod, the Radiant Dawn
33%inclusion5 decks15 decks
30%synergy
Moon-Blessed Cleric
27%inclusion4 decks15 decks
22%synergy
Overlord of the Balemurk
27%inclusion4 decks15 decks
25%synergy
Alseid of Life's Bounty
27%inclusion4 decks15 decks
25%synergy
Summon: Yojimbo
23%inclusion3 decks13 decks
22%synergy
Archon of Sun's Grace
20%inclusion3 decks15 decks
16%synergy
Ancient Cellarspawn
20%inclusion3 decks15 decks
17%synergy
Hedron Crab
20%inclusion3 decks15 decks
19%synergy
Athreos, Shroud-Veiled
20%inclusion3 decks15 decks
16%synergy
Spirited Companion
20%inclusion3 decks15 decks
18%synergy
Balemurk Leech
20%inclusion3 decks15 decks
19%synergy
Nashi, Searcher in the Dark
20%inclusion3 decks15 decks
19%synergy
Starnheim Courser
13%inclusion2 decks15 decks
10%synergy
Witch Enchanter
13%inclusion2 decks15 decks
6%synergy
Stenn, Paranoid Partisan
13%inclusion2 decks15 decks
12%synergy
Phenax, God of Deception
13%inclusion2 decks15 decks
13%synergy
Agent of Erebos
13%inclusion2 decks15 decks
13%synergy
Soaring Lightbringer
13%inclusion2 decks15 decks
9%synergy
Skullsnap Nuisance
13%inclusion2 decks15 decks
13%synergy
Deranged Assistant
13%inclusion2 decks15 decks
13%synergy
Silent Hallcreeper
13%inclusion2 decks15 decks
9%synergy
Enduring Curiosity
13%inclusion2 decks15 decks
5%synergy
Nightmare Shepherd
13%inclusion2 decks15 decks
11%synergy
Ghostly Dancers
13%inclusion2 decks15 decks
11%synergy
Millikin
13%inclusion2 decks15 decks
13%synergy
Voice of Victory
7.7%inclusion1 decks13 decks
-1%synergy
Summon: Primal Odin
7.7%inclusion1 decks13 decks
3%synergy
Symbiote Spider-Man
7.7%inclusion1 decks13 decks
7%synergy
Wraith, Vicious Vigilante
7.7%inclusion1 decks13 decks
7%synergy
Sygg, Wanderwine Wisdom
7.7%inclusion1 decks13 decks
6%synergy
Emptiness
7.7%inclusion1 decks13 decks
7%synergy
Summon: Shiva
7.1%inclusion1 decks14 decks
7%synergy
Heliod's Pilgrim
6.7%inclusion1 decks15 decks
6%synergy
Lotho, Corrupt Shirriff
6.7%inclusion1 decks15 decks
-10%synergy
Erebos, God of the Dead
6.7%inclusion1 decks15 decks
5%synergy
Kor Spiritdancer
6.7%inclusion1 decks15 decks
5%synergy
High Fae Trickster
6.7%inclusion1 decks15 decks
2%synergy
Fear of Lost Teeth
6.7%inclusion1 decks15 decks
6%synergy
Scholar of New Horizons
6.7%inclusion1 decks15 decks
6%synergy
Dorothea, Vengeful Victim
6.7%inclusion1 decks15 decks
7%synergy
The Mindskinner
6.7%inclusion1 decks15 decks
6%synergy
Faramir, Steward of Gondor
6.7%inclusion1 decks15 decks
7%synergy
Instants
Fell the Profane
20%inclusion3 decks15 decks
11%synergy
Frantic Search
20%inclusion3 decks15 decks
2%synergy
Negate
20%inclusion3 decks15 decks
4%synergy
Swords to Plowshares
20%inclusion3 decks15 decks
-48%synergy
Thirst for Meaning
20%inclusion3 decks15 decks
19%synergy
Void Rend
20%inclusion3 decks15 decks
-15%synergy
Path to Exile
20%inclusion3 decks15 decks
-22%synergy
Arcane Denial
20%inclusion3 decks15 decks
0%synergy
Sink into Stupor
20%inclusion3 decks15 decks
7%synergy
Otherworldly Gaze
20%inclusion3 decks15 decks
18%synergy
Dovin's Veto
13%inclusion2 decks15 decks
-13%synergy
An Offer You Can't Refuse
13%inclusion2 decks15 decks
-14%synergy
Dawn's Truce
13%inclusion2 decks15 decks
9%synergy
Darkblast
13%inclusion2 decks15 decks
13%synergy
Swan Song
13%inclusion2 decks15 decks
-7%synergy
Counterspell
13%inclusion2 decks15 decks
-29%synergy
Sejiri Shelter
13%inclusion2 decks15 decks
12%synergy
Inkshield
13%inclusion2 decks15 decks
4%synergy
Muddle the Mixture
6.7%inclusion1 decks15 decks
3%synergy
Drown in the Loch
6.7%inclusion1 decks15 decks
5%synergy
Disdainful Stroke
6.7%inclusion1 decks15 decks
6%synergy
Return to Dust
6.7%inclusion1 decks15 decks
3%synergy
Entomb
6.7%inclusion1 decks15 decks
0%synergy
Brainstorm
6.7%inclusion1 decks15 decks
-10%synergy
Render Silent
6.7%inclusion1 decks15 decks
3%synergy
Dark Ritual
6.7%inclusion1 decks15 decks
-13%synergy
Disallow
6.7%inclusion1 decks15 decks
3%synergy
Saw It Coming
6.7%inclusion1 decks15 decks
6%synergy
Curfew
6.7%inclusion1 decks15 decks
7%synergy
Read the Runes
6.7%inclusion1 decks15 decks
7%synergy
Curate
6.7%inclusion1 decks15 decks
6%synergy
Flusterstorm
6.7%inclusion1 decks15 decks
-1%synergy
Obscura Charm
6.7%inclusion1 decks15 decks
4%synergy
Get Out
6.7%inclusion1 decks15 decks
6%synergy
Faithful Mending
6.7%inclusion1 decks15 decks
3%synergy
Utter End
6.7%inclusion1 decks15 decks
0%synergy
Borne Upon a Wind
6.7%inclusion1 decks15 decks
2%synergy
Abjure
6.7%inclusion1 decks15 decks
6%synergy
Don't Make a Sound
6.7%inclusion1 decks15 decks
6%synergy
Sorceries
Singularity Rupture
46%inclusion6 decks13 decks
44%synergy
Extinguish All Hope
40%inclusion6 decks15 decks
38%synergy
Redress Fate
27%inclusion4 decks15 decks
21%synergy
Space-Time Anomaly
23%inclusion3 decks13 decks
22%synergy
Time Wipe
20%inclusion3 decks15 decks
14%synergy
Dance of the Manse
20%inclusion3 decks15 decks
17%synergy
Unmarked Grave
13%inclusion2 decks15 decks
12%synergy
Open the Vaults
13%inclusion2 decks15 decks
12%synergy
Glimpse the Unthinkable
13%inclusion2 decks15 decks
13%synergy
Vanquish the Horde
13%inclusion2 decks15 decks
10%synergy
Ponder
6.7%inclusion1 decks15 decks
-2%synergy
Asinine Antics
6.7%inclusion1 decks15 decks
6%synergy
Lively Dirge
6.7%inclusion1 decks15 decks
5%synergy
Resurgent Belief
6.7%inclusion1 decks15 decks
5%synergy
Ondu Inversion
6.7%inclusion1 decks15 decks
6%synergy
Abuelo's Awakening
6.7%inclusion1 decks15 decks
6%synergy
Tome Scour
6.7%inclusion1 decks15 decks
7%synergy
Unearth
6.7%inclusion1 decks15 decks
5%synergy
Replenish
6.7%inclusion1 decks15 decks
5%synergy
Curse of the Swine
6.7%inclusion1 decks15 decks
6%synergy
Idyllic Tutor
6.7%inclusion1 decks15 decks
2%synergy
Read the Bones
6.7%inclusion1 decks15 decks
3%synergy
Toxic Deluge
6.7%inclusion1 decks15 decks
-13%synergy
Damn
6.7%inclusion1 decks15 decks
-14%synergy
Blasphemous Edict
6.7%inclusion1 decks15 decks
4%synergy
Starfall Invocation
6.7%inclusion1 decks15 decks
5%synergy
Feast of Succession
6.7%inclusion1 decks15 decks
7%synergy
Buried Alive
6.7%inclusion1 decks15 decks
2%synergy
Season of the Burrow
6.7%inclusion1 decks15 decks
6%synergy
Brilliant Restoration
6.7%inclusion1 decks15 decks
5%synergy
Rite of Oblivion
6.7%inclusion1 decks15 decks
6%synergy
Notion Rain
6.7%inclusion1 decks15 decks
6%synergy
Preordain
6.7%inclusion1 decks15 decks
2%synergy
Cleansing Nova
6.7%inclusion1 decks15 decks
2%synergy
Retether
6.7%inclusion1 decks15 decks
6%synergy
Step Through
6.7%inclusion1 decks15 decks
6%synergy
Breakthrough
6.7%inclusion1 decks15 decks
7%synergy
Final Vengeance
6.7%inclusion1 decks15 decks
6%synergy
Portent
6.7%inclusion1 decks15 decks
3%synergy
Utility Artifacts
Wayfarer's Bauble
13%inclusion2 decks15 decks
6%synergy
Mesmeric Orb
6.7%inclusion1 decks15 decks
6%synergy
Perpetual Timepiece
6.7%inclusion1 decks15 decks
6%synergy
Cloud Key
6.7%inclusion1 decks15 decks
3%synergy
Helm of the Gods
6.7%inclusion1 decks15 decks
6%synergy
Whip of Erebos
6.7%inclusion1 decks15 decks
4%synergy
Confession Dial
6.7%inclusion1 decks15 decks
7%synergy
Claws of Gix
6.7%inclusion1 decks15 decks
7%synergy
Helm of Awakening
6.7%inclusion1 decks15 decks
6%synergy
Mask of Riddles
6.7%inclusion1 decks15 decks
5%synergy
Jet Medallion
6.7%inclusion1 decks15 decks
5%synergy
Swiftfoot Boots
6.7%inclusion1 decks15 decks
-18%synergy
Altar of Dementia
6.7%inclusion1 decks15 decks
5%synergy
Bident of Thassa
6.7%inclusion1 decks15 decks
-2%synergy
Enchantments
Sphere of Safety
47%inclusion7 decks15 decks
37%synergy
Starfield of Nyx
47%inclusion7 decks15 decks
43%synergy
Seal of Removal
47%inclusion7 decks15 decks
46%synergy
Cacophony Unleashed
40%inclusion6 decks15 decks
38%synergy
Mirrormade
40%inclusion6 decks15 decks
30%synergy
Estrid's Invocation
40%inclusion6 decks15 decks
35%synergy
Mystic Remora
40%inclusion6 decks15 decks
19%synergy
The Tale of Tamiyo
40%inclusion6 decks15 decks
40%synergy
Dress Down
40%inclusion6 decks15 decks
38%synergy
Cemetery Tampering
33%inclusion5 decks15 decks
33%synergy
Static Prison
33%inclusion5 decks15 decks
33%synergy
Animate Dead
33%inclusion5 decks15 decks
24%synergy
Ghostly Prison
33%inclusion5 decks15 decks
11%synergy
Teval's Judgment
31%inclusion4 decks13 decks
30%synergy
Unable to Scream
27%inclusion4 decks15 decks
26%synergy
Utter Insignificance
27%inclusion4 decks15 decks
26%synergy
Chronic Flooding
27%inclusion4 decks15 decks
27%synergy
Soul Snare
27%inclusion4 decks15 decks
26%synergy
Monologue Tax
27%inclusion4 decks15 decks
20%synergy
Secrets of the Dead
27%inclusion4 decks15 decks
26%synergy
Seal of Doom
27%inclusion4 decks15 decks
26%synergy
All That Glitters
27%inclusion4 decks15 decks
18%synergy
Kaya's Ghostform
27%inclusion4 decks15 decks
24%synergy
Solitary Confinement
27%inclusion4 decks15 decks
25%synergy
Ethereal Armor
27%inclusion4 decks15 decks
22%synergy
Hallowed Haunting
27%inclusion4 decks15 decks
24%synergy
Phyrexian Arena
27%inclusion4 decks15 decks
13%synergy
Search for Azcanta
27%inclusion4 decks15 decks
26%synergy
Noggle the Mind
25%inclusion2 decks8 decks
24%synergy
Darksteel Mutation
20%inclusion3 decks15 decks
14%synergy
Smuggler's Share
20%inclusion3 decks15 decks
18%synergy
Court of Cunning
20%inclusion3 decks15 decks
19%synergy
Lost in the Maze
20%inclusion3 decks15 decks
20%synergy
Glasswing Grace
20%inclusion3 decks15 decks
17%synergy
Blind Obedience
20%inclusion3 decks15 decks
8%synergy
Out of the Tombs
20%inclusion3 decks15 decks
20%synergy
Necromancy
20%inclusion3 decks15 decks
15%synergy
Painful Quandary
20%inclusion3 decks15 decks
17%synergy
Eaten by Piranhas
20%inclusion3 decks15 decks
19%synergy
Spirit-Sister's Call
20%inclusion3 decks15 decks
19%synergy
Timely Ward
20%inclusion3 decks15 decks
15%synergy
Bottomless Pool // Locker Room
20%inclusion3 decks15 decks
18%synergy
Secret Arcade // Dusty Parlor
20%inclusion3 decks15 decks
15%synergy
Detention Sphere
13%inclusion2 decks15 decks
12%synergy
Builder's Talent
13%inclusion2 decks15 decks
13%synergy
Treacherous Blessing
13%inclusion2 decks15 decks
13%synergy
Cramped Vents // Access Maze
13%inclusion2 decks15 decks
11%synergy
The Cruelty of Gix
13%inclusion2 decks15 decks
13%synergy
Flooded Woodlands
13%inclusion2 decks15 decks
13%synergy
Frozen Aether
13%inclusion2 decks15 decks
13%synergy
Battles
Invasion of Theros
20%inclusion3 decks15 decks
18%synergy
Utility Lands
Hall of Heliod's Generosity
47%inclusion7 decks15 decks
34%synergy
Bojuka Bog
40%inclusion6 decks15 decks
13%synergy
Cephalid Coliseum
13%inclusion2 decks15 decks
10%synergy
Rogue's Passage
13%inclusion2 decks15 decks
3%synergy
Mistrise Village
7.7%inclusion1 decks13 decks
4%synergy
Ishgard, the Holy See
7.7%inclusion1 decks13 decks
4%synergy
Halimar Depths
6.7%inclusion1 decks15 decks
2%synergy
Arcane Lighthouse
6.7%inclusion1 decks15 decks
6%synergy
Buried Ruin
6.7%inclusion1 decks15 decks
3%synergy
Sea Gate Wreckage
6.7%inclusion1 decks15 decks
7%synergy
War Room
6.7%inclusion1 decks15 decks
6%synergy
Emergence Zone
6.7%inclusion1 decks15 decks
5%synergy
Geier Reach Sanitarium
6.7%inclusion1 decks15 decks
2%synergy
Hidden Cataract
6.7%inclusion1 decks15 decks
7%synergy
Throne of the High City
6.7%inclusion1 decks15 decks
7%synergy
Takenuma, Abandoned Mire
6.7%inclusion1 decks15 decks
0%synergy
Great Hall of the Citadel
6.7%inclusion1 decks15 decks
6%synergy
Drownyard Temple
6.7%inclusion1 decks15 decks
6%synergy
Temple of the False God
6.7%inclusion1 decks15 decks
-1%synergy
Mana Artifacts
Arcane Signet
80%inclusion12 decks15 decks
-8%synergy
Sol Ring
67%inclusion10 decks15 decks
-23%synergy
Talisman of Progress
60%inclusion9 decks15 decks
16%synergy
Talisman of Hierarchy
60%inclusion9 decks15 decks
16%synergy
Talisman of Dominance
47%inclusion7 decks15 decks
-3%synergy
Azorius Signet
47%inclusion7 decks15 decks
17%synergy
Dimir Signet
33%inclusion5 decks15 decks
3%synergy
Fellwar Stone
27%inclusion4 decks15 decks
-6%synergy
Mind Stone
13%inclusion2 decks15 decks
1%synergy
Orzhov Signet
13%inclusion2 decks15 decks
-19%synergy
Commander's Sphere
6.7%inclusion1 decks15 decks
-11%synergy
Everflowing Chalice
6.7%inclusion1 decks15 decks
5%synergy
Coveted Jewel
6.7%inclusion1 decks15 decks
5%synergy
Thought Vessel
6.7%inclusion1 decks15 decks
-18%synergy
Midnight Clock
6.7%inclusion1 decks15 decks
3%synergy
Lands
Swamp
100%inclusion15 decks15 decks
8%synergy
Plains
100%inclusion15 decks15 decks
8%synergy
Island
100%inclusion15 decks15 decks
7%synergy
Command Tower
93%inclusion14 decks15 decks
1%synergy
Caves of Koilos
93%inclusion14 decks15 decks
58%synergy
Adarkar Wastes
93%inclusion14 decks15 decks
61%synergy
Arcane Sanctum
87%inclusion13 decks15 decks
33%synergy
Underground River
80%inclusion12 decks15 decks
45%synergy
Glacial Fortress
67%inclusion10 decks15 decks
24%synergy
Contaminated Landscape
60%inclusion9 decks15 decks
46%synergy
Exotic Orchard
60%inclusion9 decks15 decks
1%synergy
Isolated Chapel
60%inclusion9 decks15 decks
18%synergy
Drowned Catacomb
53%inclusion8 decks15 decks
15%synergy
Sunken Hollow
53%inclusion8 decks15 decks
14%synergy
Prairie Stream
47%inclusion7 decks15 decks
6%synergy
Valgavoth's Lair
47%inclusion7 decks15 decks
44%synergy
Godless Shrine
47%inclusion7 decks15 decks
-5%synergy
Temple of Enlightenment
47%inclusion7 decks15 decks
31%synergy
Hallowed Fountain
47%inclusion7 decks15 decks
-4%synergy
Evolving Wilds
47%inclusion7 decks15 decks
22%synergy
Obscura Storefront
47%inclusion7 decks15 decks
37%synergy
Temple of Silence
47%inclusion7 decks15 decks
28%synergy
Watery Grave
47%inclusion7 decks15 decks
-4%synergy
Port Town
40%inclusion6 decks15 decks
23%synergy
Choked Estuary
40%inclusion6 decks15 decks
24%synergy
Azorius Chancery
33%inclusion5 decks15 decks
20%synergy
Terramorphic Expanse
33%inclusion5 decks15 decks
18%synergy
Temple of Deceit
33%inclusion5 decks15 decks
16%synergy
Tainted Isle
27%inclusion4 decks15 decks
20%synergy
Dimir Aqueduct
27%inclusion4 decks15 decks
14%synergy
Tainted Field
27%inclusion4 decks15 decks
20%synergy
Darkwater Catacombs
27%inclusion4 decks15 decks
12%synergy
Ash Barrens
27%inclusion4 decks15 decks
16%synergy
Raffine's Tower
27%inclusion4 decks15 decks
-14%synergy
Path of Ancestry
27%inclusion4 decks15 decks
-1%synergy
Skycloud Expanse
27%inclusion4 decks15 decks
12%synergy
Fell the Profane
20%inclusion3 decks15 decks
11%synergy
Glasswing Grace
20%inclusion3 decks15 decks
17%synergy
Fetid Heath
20%inclusion3 decks15 decks
7%synergy
Sea of Clouds
20%inclusion3 decks15 decks
-15%synergy
Orzhov Basilica
20%inclusion3 decks15 decks
5%synergy
Sink into Stupor
20%inclusion3 decks15 decks
7%synergy
Shineshadow Snarl
20%inclusion3 decks15 decks
9%synergy
Deserted Beach
20%inclusion3 decks15 decks
-1%synergy
Witch Enchanter
13%inclusion2 decks15 decks
6%synergy
Fetid Pools
13%inclusion2 decks15 decks
7%synergy
Shipwreck Marsh
13%inclusion2 decks15 decks
-7%synergy
Irrigated Farmland
13%inclusion2 decks15 decks
6%synergy
Seachrome Coast
13%inclusion2 decks15 decks
9%synergy
Morphic Pool
13%inclusion2 decks15 decks
-20%synergy
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