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
Super Intelligence
1.1%inclusion5 decks437 decks
1%synergy
The Mind Stone
0.8%inclusion7 decks933 decks
-0%synergy
Bilbo, Thief in the Night
0.6%inclusion6 decks952 decks
1%synergy
Archnemesis
0.6%inclusion2 decks331 decks
0%synergy
Stark's Ingenuity
0.5%inclusion2 decks367 decks
0%synergy
High Synergy Cards
Ripples of Undeath
61%inclusion5.06K decks8.25K decks
59%synergy
Animate Dead
67%inclusion5.53K decks8.25K decks
57%synergy
Dress Down
57%inclusion4.67K decks8.25K decks
54%synergy
Inquisitive Glimmer
58%inclusion4.82K decks8.25K decks
51%synergy
Necromancy
55%inclusion4.50K decks8.25K decks
50%synergy
Mesa Enchantress
53%inclusion4.38K decks8.25K decks
44%synergy
Entity Tracker
50%inclusion4.12K decks8.25K decks
44%synergy
Starfield Mystic
50%inclusion4.14K decks8.25K decks
44%synergy
Gravebreaker Lamia
44%inclusion3.62K decks8.25K decks
43%synergy
Demon of Fate's Design
46%inclusion3.80K decks8.25K decks
41%synergy
Top Cards
Swords to Plowshares
61%inclusion5K decks8.25K decks
-7%synergy
Mystic Remora
58%inclusion4.81K decks8.25K decks
38%synergy
Mirrormade
47%inclusion3.89K decks8.25K decks
37%synergy
Sevinne's Reclamation
46%inclusion3.83K decks8.25K decks
38%synergy
Entomb
43%inclusion3.57K decks8.25K decks
37%synergy
Fear of Sleep Paralysis
42%inclusion3.49K decks8.25K decks
37%synergy
Doomwake Giant
42%inclusion3.47K decks8.25K decks
36%synergy
Sphere of Safety
41%inclusion3.38K decks8.25K decks
32%synergy
Scrabbling Skullcrab
40%inclusion3.33K decks8.25K decks
39%synergy
Blind Obedience
40%inclusion3.31K decks8.25K decks
28%synergy
Game Changers
Smothering Tithe
49%inclusion4.08K decks8.25K decks
19%synergy
Rhystic Study
47%inclusion3.88K decks8.25K decks
17%synergy
Enlightened Tutor
36%inclusion3K decks8.25K decks
18%synergy
Demonic Tutor
31%inclusion2.53K decks8.25K decks
11%synergy
Vampiric Tutor
28%inclusion2.32K decks8.25K decks
12%synergy
Thassa's Oracle
28%inclusion2.31K decks8.25K decks
19%synergy
Ancient Tomb
25%inclusion2.04K decks8.25K decks
12%synergy
Force of Will
24%inclusion1.98K decks8.25K decks
12%synergy
Mana Vault
24%inclusion1.98K decks8.25K decks
15%synergy
Fierce Guardianship
24%inclusion1.96K decks8.25K decks
4%synergy
Creatures
Ondu Spiritdancer
37%inclusion3.05K decks8.25K decks
31%synergy
Overlord of the Floodpits
36%inclusion2.98K decks8.25K decks
33%synergy
Overlord of the Balemurk
34%inclusion2.83K decks8.25K decks
32%synergy
Abdel Adrian, Gorion's Ward
33%inclusion2.76K decks8.25K decks
32%synergy
Victor, Valgavoth's Seneschal
33%inclusion2.74K decks8.25K decks
31%synergy
Esper Sentinel
32%inclusion2.66K decks8.25K decks
5%synergy
Fear of Impostors
31%inclusion2.52K decks8.25K decks
29%synergy
Zur, Eternal Schemer
30%inclusion2.45K decks8.25K decks
26%synergy
Grand Abolisher
27%inclusion2.20K decks8.25K decks
12%synergy
Lotho, Corrupt Shirriff
26%inclusion2.15K decks8.25K decks
9%synergy
Ghostly Dancers
24%inclusion1.99K decks8.25K decks
22%synergy
Silent Hallcreeper
23%inclusion1.90K decks8.25K decks
18%synergy
Zur the Enchanter
23%inclusion1.89K decks8.25K decks
18%synergy
Soaring Lightbringer
22%inclusion1.84K decks8.25K decks
18%synergy
Valley Floodcaller
22%inclusion1.80K decks8.25K decks
18%synergy
Orcish Bowmasters
22%inclusion1.79K decks8.25K decks
12%synergy
Enduring Curiosity
21%inclusion1.71K decks8.25K decks
13%synergy
Grim Guardian
20%inclusion1.68K decks8.25K decks
18%synergy
Moon-Blessed Cleric
20%inclusion1.65K decks8.25K decks
15%synergy
Hullbreaker Horror
20%inclusion1.64K decks8.25K decks
14%synergy
Heliod, the Radiant Dawn
20%inclusion1.63K decks8.25K decks
16%synergy
Ranger-Captain of Eos
19%inclusion1.54K decks8.25K decks
13%synergy
Aminatou, Veil Piercer
18%inclusion1.53K decks8.25K decks
17%synergy
Archon of Sun's Grace
17%inclusion1.43K decks8.25K decks
13%synergy
Displacer Kitten
17%inclusion1.42K decks8.25K decks
11%synergy
Opposition Agent
15%inclusion1.20K decks8.25K decks
7%synergy
Athreos, Shroud-Veiled
14%inclusion1.14K decks8.25K decks
10%synergy
Mindwrack Harpy
13%inclusion1.10K decks8.25K decks
13%synergy
Ledger Shredder
13%inclusion1.06K decks8.25K decks
4%synergy
Lurrus of the Dream-Den
13%inclusion1.05K decks8.25K decks
11%synergy
Archetype of Imagination
12%inclusion1.01K decks8.25K decks
8%synergy
Overlord of the Mistmoors
12%inclusion1K decks8.25K decks
10%synergy
Sage of Mysteries
12%inclusion994 decks8.25K decks
12%synergy
Hedron Crab
12%inclusion983 decks8.25K decks
11%synergy
Drannith Magistrate
11%inclusion942 decks8.25K decks
4%synergy
Alseid of Life's Bounty
11%inclusion924 decks8.25K decks
10%synergy
Mockingbird
11%inclusion905 decks8.25K decks
7%synergy
Ancient Cellarspawn
11%inclusion903 decks8.25K decks
8%synergy
Voice of Victory
11%inclusion549 decks5.19K decks
2%synergy
Skullsnap Nuisance
10%inclusion859 decks8.25K decks
10%synergy
Balemurk Leech
10%inclusion838 decks8.25K decks
10%synergy
Eiganjo Dynastorian
10%inclusion131 decks1.29K decks
9%synergy
Archivist of Oghma
10%inclusion832 decks8.25K decks
4%synergy
Talion, the Kindly Lord
9.5%inclusion783 decks8.25K decks
2%synergy
Spirited Companion
9.4%inclusion778 decks8.25K decks
8%synergy
Gremlin Tamer
9.2%inclusion756 decks8.25K decks
8%synergy
Auriok Salvagers
8.7%inclusion717 decks8.25K decks
8%synergy
Nashi, Searcher in the Dark
8.5%inclusion700 decks8.25K decks
8%synergy
Phyrexian Metamorph
7.9%inclusion656 decks8.25K decks
-0%synergy
Wan Shi Tong, Librarian
7.7%inclusion222 decks2.90K decks
3%synergy
Instants
Dark Ritual
39%inclusion3.26K decks8.25K decks
19%synergy
An Offer You Can't Refuse
35%inclusion2.90K decks8.25K decks
7%synergy
Swan Song
32%inclusion2.60K decks8.25K decks
11%synergy
Path to Exile
30%inclusion2.49K decks8.25K decks
-12%synergy
Counterspell
30%inclusion2.48K decks8.25K decks
-12%synergy
Arcane Denial
27%inclusion2.19K decks8.25K decks
6%synergy
Silence
25%inclusion2.09K decks8.25K decks
15%synergy
Cyclonic Rift
23%inclusion1.87K decks8.25K decks
-0%synergy
Force of Negation
22%inclusion1.83K decks8.25K decks
10%synergy
Flusterstorm
22%inclusion1.80K decks8.25K decks
14%synergy
Demonic Consultation
21%inclusion1.76K decks8.25K decks
14%synergy
Tainted Pact
21%inclusion1.75K decks8.25K decks
15%synergy
Mindbreak Trap
20%inclusion1.62K decks8.25K decks
13%synergy
Pact of Negation
19%inclusion1.55K decks8.25K decks
12%synergy
Intuition
19%inclusion1.55K decks8.25K decks
17%synergy
Mystical Tutor
19%inclusion1.55K decks8.25K decks
8%synergy
Borne Upon a Wind
18%inclusion1.51K decks8.25K decks
13%synergy
Mental Misstep
18%inclusion1.49K decks8.25K decks
12%synergy
Mana Drain
17%inclusion1.42K decks8.25K decks
0%synergy
Cabal Ritual
17%inclusion1.37K decks8.25K decks
13%synergy
Void Rend
15%inclusion1.27K decks8.25K decks
-19%synergy
Sink into Stupor
15%inclusion1.23K decks8.25K decks
2%synergy
Dovin's Veto
15%inclusion1.22K decks8.25K decks
-11%synergy
Thirst for Meaning
15%inclusion1.21K decks8.25K decks
13%synergy
Frantic Search
13%inclusion1.09K decks8.25K decks
-5%synergy
Otherworldly Gaze
13%inclusion1.08K decks8.25K decks
11%synergy
Inkshield
13%inclusion1.04K decks8.25K decks
3%synergy
Chain of Vapor
11%inclusion867 decks8.25K decks
8%synergy
Brainstorm
10%inclusion844 decks8.25K decks
-7%synergy
Negate
10%inclusion826 decks8.25K decks
-6%synergy
Gifts Ungiven
10%inclusion808 decks8.25K decks
7%synergy
Into the Flood Maw
10%inclusion784 decks8.25K decks
6%synergy
Anguished Unmaking
8.3%inclusion685 decks8.25K decks
-18%synergy
Fell the Profane
6.6%inclusion541 decks8.25K decks
-3%synergy
Teferi's Protection
6.4%inclusion532 decks8.25K decks
-10%synergy
Utter End
5.8%inclusion482 decks8.25K decks
-0%synergy
Ad Nauseam
5.5%inclusion450 decks8.25K decks
3%synergy
Deadly Rollick
5.4%inclusion446 decks8.25K decks
-10%synergy
Generous Gift
5.2%inclusion427 decks8.25K decks
-9%synergy
Brain Freeze
5.1%inclusion422 decks8.25K decks
5%synergy
Retraction Helix
5.0%inclusion415 decks8.25K decks
4%synergy
Sorceries
Redress Fate
30%inclusion2.45K decks8.25K decks
24%synergy
Windfall
27%inclusion2.23K decks8.25K decks
14%synergy
Reanimate
26%inclusion2.16K decks8.25K decks
10%synergy
Toxic Deluge
20%inclusion1.65K decks8.25K decks
0%synergy
Imperial Seal
17%inclusion1.41K decks8.25K decks
10%synergy
Extinguish All Hope
15%inclusion1.23K decks8.25K decks
13%synergy
Dance of the Manse
14%inclusion1.18K decks8.25K decks
11%synergy
Singularity Rupture
14%inclusion553 decks3.89K decks
12%synergy
Time Wipe
11%inclusion908 decks8.25K decks
5%synergy
Damn
10%inclusion824 decks8.25K decks
-10%synergy
Demonic Counsel
9.3%inclusion769 decks8.25K decks
8%synergy
Glimpse the Unthinkable
9.2%inclusion763 decks8.25K decks
9%synergy
Idyllic Tutor
9.2%inclusion761 decks8.25K decks
5%synergy
Supreme Verdict
9.0%inclusion743 decks8.25K decks
-6%synergy
Lively Dirge
8.8%inclusion729 decks8.25K decks
8%synergy
Resurgent Belief
8.7%inclusion721 decks8.25K decks
7%synergy
Beseech the Mirror
8.2%inclusion673 decks8.25K decks
4%synergy
Unmarked Grave
7.9%inclusion656 decks8.25K decks
7%synergy
Ponder
7.8%inclusion644 decks8.25K decks
-1%synergy
Replenish
7.7%inclusion638 decks8.25K decks
6%synergy
Buried Alive
7.2%inclusion597 decks8.25K decks
3%synergy
Space-Time Anomaly
6.9%inclusion264 decks3.83K decks
5%synergy
Mnemonic Betrayal
6.3%inclusion522 decks8.25K decks
4%synergy
Farewell
5.1%inclusion418 decks8.25K decks
-7%synergy
Utility Artifacts
The One Ring
21%inclusion1.77K decks8.25K decks
9%synergy
Wishclaw Talisman
19%inclusion1.59K decks8.25K decks
12%synergy
Mesmeric Orb
16%inclusion1.29K decks8.25K decks
14%synergy
Cloud Key
10%inclusion824 decks8.25K decks
7%synergy
Lightning Greaves
8.0%inclusion657 decks8.25K decks
-15%synergy
Keys to the House
5.8%inclusion477 decks8.23K decks
6%synergy
Swiftfoot Boots
5.6%inclusion466 decks8.25K decks
-18%synergy
Enchantments
Dance of the Dead
38%inclusion3.14K decks8.25K decks
36%synergy
Secret Arcade // Dusty Parlor
38%inclusion3.10K decks8.25K decks
33%synergy
Amphibian Downpour
37%inclusion3.06K decks8.25K decks
32%synergy
Propaganda
35%inclusion2.92K decks8.25K decks
6%synergy
Sigil of the Empty Throne
34%inclusion2.78K decks8.25K decks
28%synergy
Grasp of Fate
31%inclusion2.56K decks8.25K decks
25%synergy
Ghostly Prison
30%inclusion2.50K decks8.25K decks
7%synergy
Seal of Cleansing
30%inclusion2.49K decks8.25K decks
29%synergy
Cemetery Tampering
29%inclusion2.40K decks8.25K decks
28%synergy
Monologue Tax
26%inclusion2.16K decks8.25K decks
20%synergy
Starfield of Nyx
26%inclusion2.12K decks8.25K decks
22%synergy
Estrid's Invocation
24%inclusion2.02K decks8.25K decks
20%synergy
Necropotence
23%inclusion1.86K decks8.25K decks
16%synergy
Cacophony Unleashed
22%inclusion1.80K decks8.25K decks
20%synergy
The Meathook Massacre
21%inclusion1.75K decks8.25K decks
18%synergy
Darksteel Mutation
21%inclusion1.69K decks8.25K decks
14%synergy
Touch the Spirit Realm
21%inclusion1.69K decks8.25K decks
18%synergy
Defiled Crypt // Cadaver Lab
21%inclusion1.69K decks8.23K decks
20%synergy
Shark Typhoon
20%inclusion1.68K decks8.25K decks
15%synergy
Tinybones Joins Up
18%inclusion1.52K decks8.25K decks
17%synergy
Stillness in Motion
18%inclusion911 decks5.09K decks
18%synergy
Copy Enchantment
17%inclusion1.44K decks8.25K decks
13%synergy
All That Glitters
17%inclusion1.41K decks8.25K decks
9%synergy
Extravagant Replication
17%inclusion1.39K decks8.25K decks
12%synergy
Polluted Cistern // Dim Oubliette
17%inclusion1.37K decks8.24K decks
16%synergy
Timely Ward
16%inclusion1.34K decks8.25K decks
11%synergy
The Tale of Tamiyo
16%inclusion1.33K decks8.25K decks
16%synergy
Seal of Removal
16%inclusion1.32K decks8.25K decks
15%synergy
Ethereal Armor
16%inclusion1.31K decks8.25K decks
11%synergy
Phyrexian Arena
16%inclusion1.30K decks8.25K decks
2%synergy
Static Prison
16%inclusion1.29K decks8.25K decks
15%synergy
Black Market Connections
15%inclusion1.25K decks8.25K decks
0%synergy
Greater Auramancy
15%inclusion1.24K decks8.25K decks
11%synergy
Out of the Tombs
15%inclusion1.24K decks8.25K decks
15%synergy
Imprisoned in the Moon
15%inclusion1.23K decks8.25K decks
8%synergy
Bottomless Pool // Locker Room
14%inclusion1.14K decks8.25K decks
12%synergy
Hallowed Haunting
14%inclusion1.14K decks8.25K decks
11%synergy
Restricted Office // Lecture Hall
13%inclusion1.10K decks8.25K decks
11%synergy
Leyline of Anticipation
13%inclusion1.09K decks8.25K decks
9%synergy
The Eldest Reborn
13%inclusion1.08K decks8.25K decks
11%synergy
Mirror Room // Fractured Realm
13%inclusion1.07K decks8.25K decks
11%synergy
Cramped Vents // Access Maze
13%inclusion1.05K decks8.25K decks
11%synergy
Court of Cunning
12%inclusion1K decks8.25K decks
11%synergy
Sheltered by Ghosts
12%inclusion978 decks8.25K decks
9%synergy
Trouble in Pairs
12%inclusion971 decks8.25K decks
7%synergy
Central Elevator // Promising Stairs
11%inclusion905 decks8.25K decks
10%synergy
One with the Multiverse
11%inclusion877 decks8.25K decks
6%synergy
Teval's Judgment
11%inclusion544 decks5.17K decks
10%synergy
Dazzling Theater // Prop Room
11%inclusion867 decks8.23K decks
9%synergy
Secrets of the Dead
10%inclusion844 decks8.25K decks
10%synergy
Battles
Invasion of Theros
6.0%inclusion493 decks8.25K decks
4%synergy
Planeswalkers
Teferi, Time Raveler
17%inclusion1.39K decks8.25K decks
9%synergy
Utility Lands
Hall of Heliod's Generosity
48%inclusion3.98K decks8.25K decks
35%synergy
Bojuka Bog
32%inclusion2.67K decks8.25K decks
6%synergy
Otawara, Soaring City
32%inclusion2.63K decks8.25K decks
13%synergy
Urza's Saga
15%inclusion1.21K decks8.25K decks
3%synergy
Cephalid Coliseum
14%inclusion1.17K decks8.25K decks
11%synergy
Reliquary Tower
13%inclusion1.09K decks8.25K decks
-21%synergy
Takenuma, Abandoned Mire
13%inclusion1.03K decks8.25K decks
6%synergy
Halimar Depths
10%inclusion850 decks8.25K decks
6%synergy
Urborg, Tomb of Yawgmoth
10%inclusion792 decks8.25K decks
-3%synergy
Emergence Zone
9.1%inclusion753 decks8.25K decks
7%synergy
Serra's Sanctum
9.1%inclusion749 decks8.25K decks
7%synergy
Minamo, School at Water's Edge
7.9%inclusion654 decks8.25K decks
4%synergy
Mana Artifacts
Sol Ring
90%inclusion7.42K decks8.25K decks
0%synergy
Arcane Signet
90%inclusion7.39K decks8.25K decks
2%synergy
Talisman of Dominance
57%inclusion4.72K decks8.25K decks
7%synergy
Talisman of Progress
50%inclusion4.15K decks8.25K decks
6%synergy
Talisman of Hierarchy
44%inclusion3.64K decks8.25K decks
-1%synergy
Fellwar Stone
43%inclusion3.51K decks8.25K decks
9%synergy
Azorius Signet
34%inclusion2.82K decks8.25K decks
5%synergy
Orzhov Signet
32%inclusion2.67K decks8.25K decks
1%synergy
Lotus Petal
25%inclusion2.04K decks8.25K decks
14%synergy
Dimir Signet
24%inclusion1.99K decks8.25K decks
-6%synergy
Chrome Mox
22%inclusion1.81K decks8.25K decks
13%synergy
Mox Diamond
18%inclusion1.51K decks8.25K decks
12%synergy
Mox Opal
18%inclusion1.48K decks8.25K decks
10%synergy
Mind Stone
15%inclusion1.21K decks8.25K decks
3%synergy
Lion's Eye Diamond
14%inclusion1.15K decks8.25K decks
12%synergy
Commander's Sphere
12%inclusion992 decks8.25K decks
-5%synergy
Mox Amber
10%inclusion821 decks8.25K decks
4%synergy
Grim Monolith
8.2%inclusion676 decks8.25K decks
5%synergy
Thought Vessel
6.4%inclusion525 decks8.25K decks
-19%synergy
Chromatic Lantern
5.8%inclusion476 decks8.25K decks
-7%synergy
Lands
Command Tower
94%inclusion7.72K decks8.25K decks
1%synergy
Island
86%inclusion7.09K decks8.25K decks
-7%synergy
Swamp
84%inclusion6.91K decks8.25K decks
-8%synergy
Plains
82%inclusion6.79K decks8.25K decks
-10%synergy
Godless Shrine
59%inclusion4.84K decks8.25K decks
7%synergy
Hallowed Fountain
58%inclusion4.82K decks8.25K decks
7%synergy
Watery Grave
58%inclusion4.82K decks8.25K decks
7%synergy
Exotic Orchard
55%inclusion4.56K decks8.25K decks
-4%synergy
Flooded Strand
51%inclusion4.22K decks8.25K decks
13%synergy
Polluted Delta
51%inclusion4.19K decks8.25K decks
13%synergy
Marsh Flats
48%inclusion3.95K decks8.25K decks
12%synergy
Arcane Sanctum
47%inclusion3.88K decks8.25K decks
-7%synergy
Caves of Koilos
45%inclusion3.72K decks8.25K decks
9%synergy
Adarkar Wastes
44%inclusion3.65K decks8.25K decks
12%synergy
Underground River
42%inclusion3.48K decks8.25K decks
7%synergy
Morphic Pool
39%inclusion3.25K decks8.25K decks
6%synergy
Sea of Clouds
39%inclusion3.20K decks8.25K decks
4%synergy
Vault of Champions
36%inclusion2.97K decks8.25K decks
4%synergy
Raffine's Tower
35%inclusion2.85K decks8.25K decks
-6%synergy
Undercity Sewers
34%inclusion2.82K decks8.25K decks
19%synergy
Glacial Fortress
31%inclusion2.55K decks8.25K decks
-12%synergy
Isolated Chapel
30%inclusion2.45K decks8.25K decks
-12%synergy
Meticulous Archive
28%inclusion2.27K decks8.25K decks
14%synergy
City of Brass
27%inclusion2.23K decks8.25K decks
12%synergy
Shadowy Backstreet
26%inclusion2.13K decks8.25K decks
13%synergy
Scrubland
26%inclusion2.13K decks8.25K decks
10%synergy
Tundra
26%inclusion2.13K decks8.25K decks
10%synergy
Drowned Catacomb
26%inclusion2.12K decks8.25K decks
-13%synergy
Underground Sea
25%inclusion2.10K decks8.25K decks
10%synergy
Mana Confluence
25%inclusion2.06K decks8.25K decks
11%synergy
Bloodstained Mire
24%inclusion1.99K decks8.25K decks
14%synergy
Prairie Stream
24%inclusion1.97K decks8.25K decks
-17%synergy
Misty Rainforest
24%inclusion1.96K decks8.25K decks
13%synergy
Valgavoth's Lair
23%inclusion1.86K decks8.25K decks
20%synergy
Sunken Hollow
23%inclusion1.86K decks8.25K decks
-17%synergy
Verdant Catacombs
22%inclusion1.82K decks8.25K decks
13%synergy
Evolving Wilds
22%inclusion1.82K decks8.25K decks
-2%synergy
Scalding Tarn
22%inclusion1.78K decks8.25K decks
11%synergy
Terramorphic Expanse
21%inclusion1.74K decks8.25K decks
6%synergy
Temple of Enlightenment
21%inclusion1.72K decks8.25K decks
5%synergy
Windswept Heath
21%inclusion1.71K decks8.25K decks
11%synergy
Temple of Silence
20%inclusion1.69K decks8.25K decks
2%synergy
Gemstone Caverns
20%inclusion1.68K decks8.25K decks
13%synergy
Temple of Deceit
20%inclusion1.63K decks8.25K decks
3%synergy
Arid Mesa
19%inclusion1.56K decks8.25K decks
10%synergy
Obscura Storefront
19%inclusion1.55K decks8.25K decks
10%synergy
Tainted Field
19%inclusion1.54K decks8.25K decks
12%synergy
Tainted Isle
18%inclusion1.51K decks8.25K decks
12%synergy
Azorius Chancery
18%inclusion1.50K decks8.25K decks
5%synergy
Dimir Aqueduct
17%inclusion1.44K decks8.25K decks
5%synergy