The Master of Keys (Commander)

Harvey McGuinness
Sep 23, 2025
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.
Deck Filters
Cardsphere
Archidekt
Commander Spellbook
Moxfield
Scryfall
MTGStocks
Eiganjo Dynastorian
10%inclusion102 decks1.02K decks
9%synergy
Changing Loyalty
6.7%inclusion68 decks1.02K decks
6%synergy
Primary Research
5.5%inclusion56 decks1.02K decks
5%synergy
Exhibition Tidecaller
4.9%inclusion51 decks1.04K decks
4%synergy
Turbulent Moor
4.1%inclusion42 decks1.02K decks
1%synergy
High Synergy Cards
Ripples of Undeath
61%inclusion4.93K decks8.04K decks
59%synergy
Animate Dead
67%inclusion5.39K decks8.04K decks
57%synergy
Dress Down
57%inclusion4.57K decks8.04K decks
55%synergy
Inquisitive Glimmer
58%inclusion4.68K decks8.04K decks
51%synergy
Necromancy
55%inclusion4.41K decks8.04K decks
50%synergy
Mesa Enchantress
53%inclusion4.26K decks8.04K decks
44%synergy
Entity Tracker
50%inclusion4K decks8.04K decks
44%synergy
Starfield Mystic
50%inclusion4.03K decks8.04K decks
44%synergy
Gravebreaker Lamia
44%inclusion3.51K decks8.04K decks
43%synergy
Demon of Fate's Design
46%inclusion3.70K decks8.04K decks
41%synergy
Top Cards
Swords to Plowshares
61%inclusion4.88K decks8.04K decks
-7%synergy
Mystic Remora
59%inclusion4.71K decks8.04K decks
38%synergy
Mirrormade
47%inclusion3.76K decks8.04K decks
37%synergy
Sevinne's Reclamation
47%inclusion3.75K decks8.04K decks
38%synergy
Entomb
43%inclusion3.49K decks8.04K decks
37%synergy
Fear of Sleep Paralysis
42%inclusion3.39K decks8.04K decks
37%synergy
Doomwake Giant
42%inclusion3.37K decks8.04K decks
36%synergy
Sphere of Safety
41%inclusion3.27K decks8.04K decks
31%synergy
Blind Obedience
40%inclusion3.24K decks8.04K decks
28%synergy
Scrabbling Skullcrab
40%inclusion3.23K decks8.04K decks
39%synergy
Game Changers
Smothering Tithe
50%inclusion4.01K decks8.04K decks
19%synergy
Rhystic Study
47%inclusion3.80K decks8.04K decks
17%synergy
Enlightened Tutor
37%inclusion2.94K decks8.04K decks
18%synergy
Demonic Tutor
31%inclusion2.49K decks8.04K decks
11%synergy
Vampiric Tutor
28%inclusion2.28K decks8.04K decks
12%synergy
Thassa's Oracle
28%inclusion2.27K decks8.04K decks
19%synergy
Ancient Tomb
25%inclusion2.01K decks8.04K decks
13%synergy
Mana Vault
24%inclusion1.95K decks8.04K decks
16%synergy
Force of Will
24%inclusion1.95K decks8.04K decks
12%synergy
Fierce Guardianship
24%inclusion1.94K decks8.04K decks
4%synergy
Creatures
Ondu Spiritdancer
37%inclusion2.97K decks8.04K decks
31%synergy
Overlord of the Floodpits
36%inclusion2.89K decks8.04K decks
32%synergy
Overlord of the Balemurk
34%inclusion2.76K decks8.04K decks
32%synergy
Abdel Adrian, Gorion's Ward
34%inclusion2.71K decks8.04K decks
32%synergy
Victor, Valgavoth's Seneschal
33%inclusion2.68K decks8.04K decks
31%synergy
Esper Sentinel
33%inclusion2.61K decks8.04K decks
5%synergy
Fear of Impostors
31%inclusion2.45K decks8.04K decks
29%synergy
Zur, Eternal Schemer
29%inclusion2.37K decks8.04K decks
26%synergy
Grand Abolisher
27%inclusion2.16K decks8.04K decks
12%synergy
Lotho, Corrupt Shirriff
26%inclusion2.11K decks8.04K decks
9%synergy
Ghostly Dancers
24%inclusion1.95K decks8.04K decks
22%synergy
Silent Hallcreeper
23%inclusion1.84K decks8.04K decks
18%synergy
Zur the Enchanter
23%inclusion1.84K decks8.04K decks
18%synergy
Soaring Lightbringer
22%inclusion1.80K decks8.04K decks
18%synergy
Valley Floodcaller
22%inclusion1.77K decks8.04K decks
18%synergy
Orcish Bowmasters
22%inclusion1.77K decks8.04K decks
12%synergy
Enduring Curiosity
21%inclusion1.67K decks8.04K decks
13%synergy
Grim Guardian
20%inclusion1.64K decks8.04K decks
18%synergy
Hullbreaker Horror
20%inclusion1.61K decks8.04K decks
14%synergy
Moon-Blessed Cleric
20%inclusion1.60K decks8.04K decks
15%synergy
Heliod, the Radiant Dawn
20%inclusion1.59K decks8.04K decks
16%synergy
Ranger-Captain of Eos
19%inclusion1.51K decks8.04K decks
13%synergy
Aminatou, Veil Piercer
19%inclusion1.49K decks8.04K decks
17%synergy
Displacer Kitten
17%inclusion1.40K decks8.04K decks
11%synergy
Archon of Sun's Grace
17%inclusion1.39K decks8.04K decks
13%synergy
Opposition Agent
15%inclusion1.19K decks8.04K decks
7%synergy
Athreos, Shroud-Veiled
14%inclusion1.11K decks8.04K decks
9%synergy
Mindwrack Harpy
13%inclusion1.08K decks8.04K decks
13%synergy
Ledger Shredder
13%inclusion1.04K decks8.04K decks
4%synergy
Lurrus of the Dream-Den
13%inclusion1.03K decks8.04K decks
11%synergy
Archetype of Imagination
12%inclusion988 decks8.04K decks
8%synergy
Overlord of the Mistmoors
12%inclusion977 decks8.04K decks
10%synergy
Sage of Mysteries
12%inclusion957 decks8.04K decks
12%synergy
Hedron Crab
12%inclusion953 decks8.04K decks
11%synergy
Drannith Magistrate
12%inclusion936 decks8.04K decks
4%synergy
Alseid of Life's Bounty
11%inclusion901 decks8.04K decks
10%synergy
Mockingbird
11%inclusion885 decks8.04K decks
7%synergy
Ancient Cellarspawn
11%inclusion880 decks8.04K decks
8%synergy
Voice of Victory
11%inclusion534 decks4.97K decks
2%synergy
Skullsnap Nuisance
10%inclusion841 decks8.04K decks
10%synergy
Archivist of Oghma
10%inclusion820 decks8.04K decks
4%synergy
Balemurk Leech
10%inclusion813 decks8.04K decks
9%synergy
Talion, the Kindly Lord
10%inclusion783 decks8.04K decks
2%synergy
Spirited Companion
9.4%inclusion759 decks8.04K decks
8%synergy
Gremlin Tamer
9.1%inclusion735 decks8.04K decks
8%synergy
Auriok Salvagers
8.8%inclusion709 decks8.04K decks
9%synergy
Nashi, Searcher in the Dark
8.6%inclusion688 decks8.04K decks
8%synergy
Phyrexian Metamorph
8.1%inclusion648 decks8.04K decks
0%synergy
Wan Shi Tong, Librarian
7.9%inclusion211 decks2.67K decks
3%synergy
Fear of Infinity
7.5%inclusion603 decks8.04K decks
7%synergy
Instants
Dark Ritual
40%inclusion3.19K decks8.04K decks
20%synergy
An Offer You Can't Refuse
35%inclusion2.84K decks8.04K decks
8%synergy
Swan Song
32%inclusion2.54K decks8.04K decks
12%synergy
Path to Exile
30%inclusion2.43K decks8.04K decks
-12%synergy
Counterspell
30%inclusion2.41K decks8.04K decks
-12%synergy
Arcane Denial
26%inclusion2.13K decks8.04K decks
6%synergy
Silence
26%inclusion2.06K decks8.04K decks
16%synergy
Cyclonic Rift
23%inclusion1.84K decks8.04K decks
0%synergy
Force of Negation
22%inclusion1.80K decks8.04K decks
11%synergy
Flusterstorm
22%inclusion1.77K decks8.04K decks
14%synergy
Demonic Consultation
22%inclusion1.73K decks8.04K decks
14%synergy
Tainted Pact
21%inclusion1.72K decks8.04K decks
15%synergy
Mindbreak Trap
20%inclusion1.60K decks8.04K decks
13%synergy
Intuition
19%inclusion1.53K decks8.04K decks
17%synergy
Pact of Negation
19%inclusion1.53K decks8.04K decks
12%synergy
Mystical Tutor
19%inclusion1.52K decks8.04K decks
8%synergy
Borne Upon a Wind
18%inclusion1.48K decks8.04K decks
14%synergy
Mental Misstep
18%inclusion1.47K decks8.04K decks
12%synergy
Mana Drain
17%inclusion1.40K decks8.04K decks
0%synergy
Cabal Ritual
17%inclusion1.34K decks8.04K decks
13%synergy
Void Rend
15%inclusion1.24K decks8.04K decks
-19%synergy
Sink into Stupor
15%inclusion1.20K decks8.04K decks
2%synergy
Dovin's Veto
15%inclusion1.19K decks8.04K decks
-11%synergy
Thirst for Meaning
15%inclusion1.18K decks8.04K decks
13%synergy
Frantic Search
13%inclusion1.06K decks8.04K decks
-5%synergy
Otherworldly Gaze
13%inclusion1.04K decks8.04K decks
11%synergy
Inkshield
13%inclusion1.02K decks8.04K decks
3%synergy
Chain of Vapor
11%inclusion853 decks8.04K decks
8%synergy
Brainstorm
10%inclusion816 decks8.04K decks
-7%synergy
Negate
10%inclusion807 decks8.04K decks
-6%synergy
Gifts Ungiven
10%inclusion779 decks8.04K decks
7%synergy
Into the Flood Maw
10%inclusion769 decks8.04K decks
6%synergy
Anguished Unmaking
8.2%inclusion660 decks8.04K decks
-18%synergy
Teferi's Protection
6.5%inclusion523 decks8.04K decks
-10%synergy
Fell the Profane
6.4%inclusion518 decks8.04K decks
-3%synergy
Utter End
5.8%inclusion468 decks8.04K decks
0%synergy
Ad Nauseam
5.5%inclusion442 decks8.04K decks
3%synergy
Deadly Rollick
5.4%inclusion431 decks8.04K decks
-10%synergy
Generous Gift
5.2%inclusion420 decks8.04K decks
-9%synergy
Retraction Helix
5.1%inclusion410 decks8.04K decks
4%synergy
Brain Freeze
5.0%inclusion406 decks8.04K decks
4%synergy
Sorceries
Redress Fate
30%inclusion2.38K decks8.04K decks
24%synergy
Windfall
27%inclusion2.18K decks8.04K decks
14%synergy
Reanimate
26%inclusion2.11K decks8.04K decks
10%synergy
Toxic Deluge
20%inclusion1.62K decks8.04K decks
0%synergy
Imperial Seal
17%inclusion1.39K decks8.04K decks
10%synergy
Extinguish All Hope
15%inclusion1.19K decks8.04K decks
13%synergy
Singularity Rupture
14%inclusion528 decks3.67K decks
12%synergy
Dance of the Manse
14%inclusion1.15K decks8.04K decks
11%synergy
Time Wipe
11%inclusion889 decks8.04K decks
5%synergy
Damn
10%inclusion806 decks8.04K decks
-10%synergy
Demonic Counsel
9.5%inclusion761 decks8.04K decks
8%synergy
Idyllic Tutor
9.2%inclusion740 decks8.04K decks
5%synergy
Glimpse the Unthinkable
9.2%inclusion737 decks8.04K decks
9%synergy
Supreme Verdict
9.0%inclusion721 decks8.04K decks
-6%synergy
Lively Dirge
8.9%inclusion712 decks8.04K decks
8%synergy
Resurgent Belief
8.8%inclusion704 decks8.04K decks
7%synergy
Beseech the Mirror
8.2%inclusion659 decks8.04K decks
4%synergy
Unmarked Grave
8.0%inclusion647 decks8.04K decks
7%synergy
Ponder
7.7%inclusion622 decks8.04K decks
-1%synergy
Replenish
7.6%inclusion608 decks8.04K decks
6%synergy
Buried Alive
7.2%inclusion581 decks8.04K decks
3%synergy
Space-Time Anomaly
6.9%inclusion248 decks3.61K decks
5%synergy
Mnemonic Betrayal
6.5%inclusion519 decks8.04K decks
4%synergy
Farewell
5.1%inclusion412 decks8.04K decks
-7%synergy
Utility Artifacts
The One Ring
22%inclusion1.76K decks8.04K decks
9%synergy
Wishclaw Talisman
19%inclusion1.56K decks8.04K decks
12%synergy
Mesmeric Orb
15%inclusion1.25K decks8.04K decks
14%synergy
Cloud Key
10%inclusion801 decks8.04K decks
7%synergy
Lightning Greaves
8.0%inclusion640 decks8.04K decks
-15%synergy
Keys to the House
5.8%inclusion462 decks8.02K decks
6%synergy
Swiftfoot Boots
5.6%inclusion454 decks8.04K decks
-19%synergy
Enchantments
Dance of the Dead
38%inclusion3.07K decks8.04K decks
36%synergy
Secret Arcade // Dusty Parlor
38%inclusion3.02K decks8.04K decks
33%synergy
Amphibian Downpour
37%inclusion2.97K decks8.04K decks
32%synergy
Propaganda
35%inclusion2.83K decks8.04K decks
6%synergy
Sigil of the Empty Throne
34%inclusion2.71K decks8.04K decks
28%synergy
Grasp of Fate
31%inclusion2.48K decks8.04K decks
25%synergy
Seal of Cleansing
30%inclusion2.41K decks8.04K decks
29%synergy
Ghostly Prison
30%inclusion2.41K decks8.04K decks
7%synergy
Cemetery Tampering
29%inclusion2.33K decks8.04K decks
28%synergy
Monologue Tax
26%inclusion2.09K decks8.04K decks
20%synergy
Starfield of Nyx
26%inclusion2.05K decks8.04K decks
22%synergy
Estrid's Invocation
24%inclusion1.94K decks8.04K decks
19%synergy
Necropotence
23%inclusion1.84K decks8.04K decks
16%synergy
Cacophony Unleashed
22%inclusion1.75K decks8.04K decks
20%synergy
The Meathook Massacre
21%inclusion1.70K decks8.04K decks
18%synergy
Touch the Spirit Realm
20%inclusion1.65K decks8.04K decks
18%synergy
Defiled Crypt // Cadaver Lab
20%inclusion1.64K decks8.02K decks
20%synergy
Darksteel Mutation
20%inclusion1.65K decks8.04K decks
14%synergy
Shark Typhoon
20%inclusion1.63K decks8.04K decks
14%synergy
Tinybones Joins Up
19%inclusion1.50K decks8.04K decks
17%synergy
Stillness in Motion
18%inclusion876 decks4.87K decks
18%synergy
Copy Enchantment
17%inclusion1.38K decks8.04K decks
12%synergy
All That Glitters
17%inclusion1.37K decks8.04K decks
9%synergy
Polluted Cistern // Dim Oubliette
17%inclusion1.34K decks8.03K decks
16%synergy
Extravagant Replication
17%inclusion1.35K decks8.04K decks
12%synergy
Timely Ward
16%inclusion1.31K decks8.04K decks
11%synergy
The Tale of Tamiyo
16%inclusion1.29K decks8.04K decks
16%synergy
Seal of Removal
16%inclusion1.29K decks8.04K decks
15%synergy
Static Prison
16%inclusion1.27K decks8.04K decks
15%synergy
Ethereal Armor
16%inclusion1.26K decks8.04K decks
11%synergy
Phyrexian Arena
16%inclusion1.26K decks8.04K decks
2%synergy
Black Market Connections
15%inclusion1.22K decks8.04K decks
0%synergy
Greater Auramancy
15%inclusion1.21K decks8.04K decks
11%synergy
Out of the Tombs
15%inclusion1.20K decks8.04K decks
14%synergy
Imprisoned in the Moon
15%inclusion1.19K decks8.04K decks
8%synergy
Hallowed Haunting
14%inclusion1.11K decks8.04K decks
11%synergy
Bottomless Pool // Locker Room
14%inclusion1.10K decks8.04K decks
12%synergy
Restricted Office // Lecture Hall
13%inclusion1.07K decks8.04K decks
11%synergy
Leyline of Anticipation
13%inclusion1.06K decks8.04K decks
9%synergy
The Eldest Reborn
13%inclusion1.04K decks8.04K decks
11%synergy
Mirror Room // Fractured Realm
13%inclusion1.04K decks8.04K decks
11%synergy
Cramped Vents // Access Maze
13%inclusion1.03K decks8.04K decks
11%synergy
Court of Cunning
12%inclusion969 decks8.04K decks
11%synergy
Trouble in Pairs
12%inclusion956 decks8.04K decks
7%synergy
Sheltered by Ghosts
12%inclusion937 decks8.04K decks
9%synergy
Central Elevator // Promising Stairs
11%inclusion875 decks8.04K decks
10%synergy
Dazzling Theater // Prop Room
11%inclusion850 decks8.02K decks
9%synergy
Teval's Judgment
11%inclusion524 decks4.95K decks
10%synergy
One with the Multiverse
11%inclusion845 decks8.04K decks
6%synergy
Copy Artifact
10%inclusion830 decks8.04K decks
9%synergy
Battles
Invasion of Theros
6.0%inclusion480 decks8.04K decks
4%synergy
Planeswalkers
Teferi, Time Raveler
17%inclusion1.37K decks8.04K decks
9%synergy
Utility Lands
Hall of Heliod's Generosity
48%inclusion3.87K decks8.04K decks
35%synergy
Bojuka Bog
32%inclusion2.60K decks8.04K decks
5%synergy
Otawara, Soaring City
32%inclusion2.59K decks8.04K decks
13%synergy
Urza's Saga
15%inclusion1.18K decks8.04K decks
3%synergy
Cephalid Coliseum
14%inclusion1.14K decks8.04K decks
11%synergy
Reliquary Tower
13%inclusion1.06K decks8.04K decks
-21%synergy
Takenuma, Abandoned Mire
13%inclusion1.01K decks8.04K decks
6%synergy
Halimar Depths
10%inclusion826 decks8.04K decks
6%synergy
Urborg, Tomb of Yawgmoth
10%inclusion772 decks8.04K decks
-3%synergy
Emergence Zone
9.1%inclusion733 decks8.04K decks
7%synergy
Serra's Sanctum
9.1%inclusion730 decks8.04K decks
7%synergy
Minamo, School at Water's Edge
8.1%inclusion654 decks8.04K decks
4%synergy
Mana Artifacts
Sol Ring
90%inclusion7.24K decks8.04K decks
0%synergy
Arcane Signet
90%inclusion7.21K decks8.04K decks
2%synergy
Talisman of Dominance
57%inclusion4.60K decks8.04K decks
7%synergy
Talisman of Progress
50%inclusion4.04K decks8.04K decks
6%synergy
Talisman of Hierarchy
44%inclusion3.54K decks8.04K decks
-1%synergy
Fellwar Stone
43%inclusion3.42K decks8.04K decks
9%synergy
Azorius Signet
34%inclusion2.74K decks8.04K decks
4%synergy
Orzhov Signet
32%inclusion2.59K decks8.04K decks
0%synergy
Lotus Petal
25%inclusion2.01K decks8.04K decks
15%synergy
Dimir Signet
24%inclusion1.94K decks8.04K decks
-6%synergy
Chrome Mox
22%inclusion1.78K decks8.04K decks
13%synergy
Mox Diamond
19%inclusion1.49K decks8.04K decks
12%synergy
Mox Opal
18%inclusion1.46K decks8.04K decks
10%synergy
Mind Stone
15%inclusion1.18K decks8.04K decks
3%synergy
Lion's Eye Diamond
14%inclusion1.13K decks8.04K decks
12%synergy
Commander's Sphere
12%inclusion963 decks8.04K decks
-5%synergy
Mox Amber
10%inclusion805 decks8.04K decks
4%synergy
Grim Monolith
8.3%inclusion668 decks8.04K decks
5%synergy
Thought Vessel
6.3%inclusion510 decks8.04K decks
-19%synergy
Chromatic Lantern
5.8%inclusion470 decks8.04K decks
-7%synergy
Lands
Command Tower
94%inclusion7.53K decks8.04K decks
1%synergy
Island
86%inclusion6.91K decks8.04K decks
-7%synergy
Swamp
84%inclusion6.72K decks8.04K decks
-8%synergy
Plains
82%inclusion6.60K decks8.04K decks
-10%synergy
Godless Shrine
59%inclusion4.72K decks8.04K decks
7%synergy
Watery Grave
58%inclusion4.70K decks8.04K decks
7%synergy
Hallowed Fountain
58%inclusion4.70K decks8.04K decks
8%synergy
Exotic Orchard
55%inclusion4.44K decks8.04K decks
-4%synergy
Flooded Strand
51%inclusion4.13K decks8.04K decks
13%synergy
Polluted Delta
51%inclusion4.10K decks8.04K decks
13%synergy
Marsh Flats
48%inclusion3.86K decks8.04K decks
12%synergy
Arcane Sanctum
47%inclusion3.77K decks8.04K decks
-7%synergy
Caves of Koilos
45%inclusion3.62K decks8.04K decks
9%synergy
Adarkar Wastes
44%inclusion3.54K decks8.04K decks
12%synergy
Underground River
42%inclusion3.38K decks8.04K decks
7%synergy
Morphic Pool
39%inclusion3.17K decks8.04K decks
6%synergy
Sea of Clouds
39%inclusion3.12K decks8.04K decks
4%synergy
Vault of Champions
36%inclusion2.89K decks8.04K decks
4%synergy
Raffine's Tower
35%inclusion2.78K decks8.04K decks
-6%synergy
Undercity Sewers
34%inclusion2.76K decks8.04K decks
20%synergy
Glacial Fortress
31%inclusion2.48K decks8.04K decks
-12%synergy
Isolated Chapel
29%inclusion2.36K decks8.04K decks
-12%synergy
Meticulous Archive
28%inclusion2.21K decks8.04K decks
14%synergy
City of Brass
27%inclusion2.19K decks8.04K decks
12%synergy
Scrubland
26%inclusion2.10K decks8.04K decks
10%synergy
Tundra
26%inclusion2.09K decks8.04K decks
10%synergy
Shadowy Backstreet
26%inclusion2.08K decks8.04K decks
13%synergy
Underground Sea
26%inclusion2.06K decks8.04K decks
10%synergy
Drowned Catacomb
26%inclusion2.05K decks8.04K decks
-13%synergy
Mana Confluence
25%inclusion2.02K decks8.04K decks
11%synergy
Bloodstained Mire
24%inclusion1.95K decks8.04K decks
14%synergy
Misty Rainforest
24%inclusion1.92K decks8.04K decks
13%synergy
Prairie Stream
24%inclusion1.91K decks8.04K decks
-17%synergy
Valgavoth's Lair
23%inclusion1.82K decks8.04K decks
20%synergy
Sunken Hollow
22%inclusion1.80K decks8.04K decks
-17%synergy
Verdant Catacombs
22%inclusion1.79K decks8.04K decks
13%synergy
Evolving Wilds
22%inclusion1.77K decks8.04K decks
-2%synergy
Scalding Tarn
22%inclusion1.74K decks8.04K decks
11%synergy
Terramorphic Expanse
21%inclusion1.70K decks8.04K decks
5%synergy
Windswept Heath
21%inclusion1.67K decks8.04K decks
11%synergy
Temple of Enlightenment
21%inclusion1.67K decks8.04K decks
5%synergy
Gemstone Caverns
21%inclusion1.66K decks8.04K decks
13%synergy
Temple of Silence
20%inclusion1.64K decks8.04K decks
2%synergy
Temple of Deceit
20%inclusion1.57K decks8.04K decks
3%synergy
Arid Mesa
19%inclusion1.53K decks8.04K decks
10%synergy
Obscura Storefront
19%inclusion1.52K decks8.04K decks
10%synergy
Tainted Field
19%inclusion1.50K decks8.04K decks
12%synergy
Tainted Isle
18%inclusion1.47K decks8.04K decks
12%synergy
Azorius Chancery
18%inclusion1.46K decks8.04K decks
5%synergy
Dimir Aqueduct
17%inclusion1.40K decks8.04K decks
5%synergy