The Master of Keys (Commander)

Background image for What if Thassa's Oracle Were Banned?
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
Wan Shi Tong, Librarian
7.6%inclusion77 decks1.02K decks
2%synergy
Noggle the Mind
2.2%inclusion1 decks46 decks
2%synergy
Chakra Meditation
1.9%inclusion17 decks910 decks
2%synergy
The Legend of Yangchen
1.3%inclusion13 decks976 decks
1%synergy
The Rise of Sozin
1.2%inclusion22 decks1.82K decks
1%synergy
High Synergy Cards
Animate Dead
68%inclusion4.51K decks6.61K decks
59%synergy
Ripples of Undeath
61%inclusion4.03K decks6.61K decks
58%synergy
Dress Down
58%inclusion3.84K decks6.61K decks
56%synergy
Necromancy
56%inclusion3.73K decks6.61K decks
52%synergy
Inquisitive Glimmer
56%inclusion3.73K decks6.61K decks
49%synergy
Mesa Enchantress
52%inclusion3.45K decks6.61K decks
43%synergy
Starfield Mystic
49%inclusion3.24K decks6.61K decks
42%synergy
Entity Tracker
49%inclusion3.22K decks6.61K decks
42%synergy
Gravebreaker Lamia
42%inclusion2.76K decks6.61K decks
41%synergy
Demon of Fate's Design
45%inclusion2.96K decks6.61K decks
39%synergy
Top Cards
Swords to Plowshares
62%inclusion4.11K decks6.61K decks
-6%synergy
Mystic Remora
60%inclusion3.99K decks6.61K decks
39%synergy
Sevinne's Reclamation
47%inclusion3.12K decks6.61K decks
38%synergy
Mirrormade
46%inclusion3.02K decks6.61K decks
36%synergy
Entomb
44%inclusion2.94K decks6.61K decks
38%synergy
Blind Obedience
42%inclusion2.77K decks6.61K decks
29%synergy
Fear of Sleep Paralysis
42%inclusion2.75K decks6.61K decks
36%synergy
Doomwake Giant
41%inclusion2.71K decks6.61K decks
35%synergy
Dark Ritual
41%inclusion2.70K decks6.61K decks
22%synergy
Sphere of Safety
40%inclusion2.63K decks6.61K decks
30%synergy
Game Changers
Smothering Tithe
52%inclusion3.44K decks6.61K decks
20%synergy
Rhystic Study
50%inclusion3.30K decks6.61K decks
18%synergy
Enlightened Tutor
39%inclusion2.58K decks6.61K decks
19%synergy
Demonic Tutor
33%inclusion2.20K decks6.61K decks
12%synergy
Thassa's Oracle
31%inclusion2.03K decks6.61K decks
21%synergy
Vampiric Tutor
31%inclusion2.03K decks6.61K decks
13%synergy
Ancient Tomb
27%inclusion1.81K decks6.61K decks
14%synergy
Fierce Guardianship
27%inclusion1.76K decks6.61K decks
6%synergy
Force of Will
27%inclusion1.76K decks6.61K decks
14%synergy
Mana Vault
27%inclusion1.76K decks6.61K decks
17%synergy
Creatures
Scrabbling Skullcrab
39%inclusion2.56K decks6.61K decks
38%synergy
Ondu Spiritdancer
36%inclusion2.41K decks6.61K decks
30%synergy
Abdel Adrian, Gorion's Ward
36%inclusion2.37K decks6.61K decks
34%synergy
Esper Sentinel
34%inclusion2.28K decks6.61K decks
7%synergy
Overlord of the Floodpits
34%inclusion2.27K decks6.61K decks
31%synergy
Overlord of the Balemurk
34%inclusion2.22K decks6.61K decks
32%synergy
Victor, Valgavoth's Seneschal
32%inclusion2.12K decks6.61K decks
30%synergy
Fear of Impostors
29%inclusion1.93K decks6.61K decks
28%synergy
Grand Abolisher
29%inclusion1.92K decks6.61K decks
14%synergy
Zur, Eternal Schemer
28%inclusion1.87K decks6.61K decks
25%synergy
Lotho, Corrupt Shirriff
28%inclusion1.83K decks6.61K decks
11%synergy
Orcish Bowmasters
24%inclusion1.61K decks6.61K decks
13%synergy
Valley Floodcaller
24%inclusion1.59K decks6.61K decks
20%synergy
Ghostly Dancers
24%inclusion1.57K decks6.61K decks
21%synergy
Zur the Enchanter
22%inclusion1.48K decks6.61K decks
17%synergy
Soaring Lightbringer
22%inclusion1.47K decks6.61K decks
17%synergy
Hullbreaker Horror
22%inclusion1.45K decks6.61K decks
16%synergy
Silent Hallcreeper
22%inclusion1.44K decks6.61K decks
17%synergy
Ranger-Captain of Eos
21%inclusion1.38K decks6.61K decks
14%synergy
Enduring Curiosity
21%inclusion1.37K decks6.61K decks
13%synergy
Heliod, the Radiant Dawn
20%inclusion1.33K decks6.61K decks
16%synergy
Moon-Blessed Cleric
20%inclusion1.32K decks6.61K decks
15%synergy
Displacer Kitten
19%inclusion1.29K decks6.61K decks
12%synergy
Grim Guardian
19%inclusion1.27K decks6.61K decks
17%synergy
Aminatou, Veil Piercer
18%inclusion1.21K decks6.61K decks
17%synergy
Archon of Sun's Grace
17%inclusion1.14K decks6.61K decks
13%synergy
Opposition Agent
16%inclusion1.09K decks6.61K decks
8%synergy
Ledger Shredder
14%inclusion924 decks6.61K decks
5%synergy
Lurrus of the Dream-Den
14%inclusion910 decks6.61K decks
12%synergy
Mindwrack Harpy
14%inclusion902 decks6.61K decks
13%synergy
Athreos, Shroud-Veiled
14%inclusion898 decks6.61K decks
9%synergy
Drannith Magistrate
13%inclusion878 decks6.61K decks
5%synergy
Archetype of Imagination
12%inclusion789 decks6.61K decks
7%synergy
Overlord of the Mistmoors
12%inclusion786 decks6.61K decks
10%synergy
Mockingbird
12%inclusion778 decks6.61K decks
7%synergy
Archivist of Oghma
11%inclusion758 decks6.61K decks
5%synergy
Voice of Victory
11%inclusion398 decks3.49K decks
3%synergy
Talion, the Kindly Lord
11%inclusion749 decks6.61K decks
3%synergy
Sage of Mysteries
11%inclusion739 decks6.61K decks
11%synergy
Ancient Cellarspawn
11%inclusion738 decks6.61K decks
8%synergy
Hedron Crab
11%inclusion732 decks6.61K decks
10%synergy
Alseid of Life's Bounty
11%inclusion731 decks6.61K decks
10%synergy
Balemurk Leech
10%inclusion672 decks6.61K decks
9%synergy
Skullsnap Nuisance
10%inclusion668 decks6.61K decks
10%synergy
Auriok Salvagers
10%inclusion647 decks6.61K decks
9%synergy
Spirited Companion
10%inclusion636 decks6.61K decks
8%synergy
Phyrexian Metamorph
9.4%inclusion619 decks6.61K decks
1%synergy
Gremlin Tamer
9.1%inclusion600 decks6.61K decks
8%synergy
Nashi, Searcher in the Dark
8.9%inclusion589 decks6.61K decks
8%synergy
Pollywog Prodigy
7.7%inclusion510 decks6.61K decks
4%synergy
Instants
An Offer You Can't Refuse
36%inclusion2.38K decks6.61K decks
9%synergy
Swan Song
33%inclusion2.16K decks6.61K decks
13%synergy
Path to Exile
30%inclusion2K decks6.61K decks
-12%synergy
Counterspell
29%inclusion1.91K decks6.61K decks
-12%synergy
Silence
27%inclusion1.82K decks6.61K decks
17%synergy
Arcane Denial
26%inclusion1.74K decks6.61K decks
6%synergy
Cyclonic Rift
25%inclusion1.66K decks6.61K decks
1%synergy
Force of Negation
25%inclusion1.62K decks6.61K decks
13%synergy
Flusterstorm
24%inclusion1.59K decks6.61K decks
16%synergy
Tainted Pact
24%inclusion1.56K decks6.61K decks
16%synergy
Demonic Consultation
24%inclusion1.56K decks6.61K decks
15%synergy
Mindbreak Trap
22%inclusion1.45K decks6.61K decks
15%synergy
Intuition
21%inclusion1.40K decks6.61K decks
19%synergy
Mystical Tutor
21%inclusion1.39K decks6.61K decks
9%synergy
Pact of Negation
21%inclusion1.38K decks6.61K decks
13%synergy
Borne Upon a Wind
20%inclusion1.33K decks6.61K decks
15%synergy
Mental Misstep
20%inclusion1.32K decks6.61K decks
13%synergy
Mana Drain
18%inclusion1.22K decks6.61K decks
1%synergy
Cabal Ritual
18%inclusion1.17K decks6.61K decks
14%synergy
Sink into Stupor
15%inclusion1.01K decks6.61K decks
3%synergy
Void Rend
15%inclusion988 decks6.61K decks
-19%synergy
Thirst for Meaning
15%inclusion967 decks6.61K decks
13%synergy
Dovin's Veto
14%inclusion943 decks6.61K decks
-11%synergy
Otherworldly Gaze
13%inclusion846 decks6.61K decks
11%synergy
Inkshield
13%inclusion835 decks6.61K decks
3%synergy
Frantic Search
12%inclusion811 decks6.61K decks
-5%synergy
Chain of Vapor
12%inclusion769 decks6.61K decks
8%synergy
Brainstorm
10%inclusion679 decks6.61K decks
-7%synergy
Into the Flood Maw
10%inclusion666 decks6.61K decks
6%synergy
Negate
10%inclusion662 decks6.61K decks
-6%synergy
Gifts Ungiven
8.6%inclusion569 decks6.61K decks
6%synergy
Anguished Unmaking
8.4%inclusion552 decks6.61K decks
-17%synergy
Teferi's Protection
6.9%inclusion457 decks6.61K decks
-10%synergy
Fell the Profane
6.4%inclusion425 decks6.61K decks
-2%synergy
Ad Nauseam
5.9%inclusion389 decks6.61K decks
3%synergy
Utter End
5.7%inclusion376 decks6.61K decks
-1%synergy
Deadly Rollick
5.5%inclusion361 decks6.61K decks
-9%synergy
Generous Gift
5.4%inclusion360 decks6.61K decks
-9%synergy
Retraction Helix
5.4%inclusion358 decks6.61K decks
5%synergy
Brain Freeze
5.4%inclusion356 decks6.61K decks
5%synergy
Sorceries
Redress Fate
30%inclusion1.95K decks6.61K decks
23%synergy
Windfall
28%inclusion1.84K decks6.61K decks
14%synergy
Reanimate
26%inclusion1.73K decks6.61K decks
10%synergy
Toxic Deluge
22%inclusion1.44K decks6.61K decks
2%synergy
Imperial Seal
19%inclusion1.27K decks6.61K decks
12%synergy
Singularity Rupture
15%inclusion320 decks2.13K decks
13%synergy
Dance of the Manse
14%inclusion948 decks6.61K decks
11%synergy
Extinguish All Hope
14%inclusion946 decks6.61K decks
13%synergy
Time Wipe
12%inclusion769 decks6.61K decks
5%synergy
Damn
11%inclusion701 decks6.61K decks
-10%synergy
Demonic Counsel
10%inclusion682 decks6.61K decks
9%synergy
Idyllic Tutor
9.2%inclusion609 decks6.61K decks
5%synergy
Lively Dirge
9.0%inclusion596 decks6.61K decks
8%synergy
Supreme Verdict
9.0%inclusion596 decks6.61K decks
-6%synergy
Resurgent Belief
8.7%inclusion577 decks6.61K decks
7%synergy
Beseech the Mirror
8.6%inclusion567 decks6.61K decks
5%synergy
Unmarked Grave
8.4%inclusion552 decks6.61K decks
7%synergy
Glimpse the Unthinkable
8.3%inclusion550 decks6.61K decks
8%synergy
Space-Time Anomaly
7.9%inclusion163 decks2.06K decks
6%synergy
Ponder
7.8%inclusion518 decks6.61K decks
-1%synergy
Replenish
7.3%inclusion485 decks6.61K decks
6%synergy
Buried Alive
7.2%inclusion473 decks6.61K decks
3%synergy
Mnemonic Betrayal
6.8%inclusion452 decks6.61K decks
4%synergy
Farewell
5.4%inclusion358 decks6.61K decks
-8%synergy
Utility Artifacts
The One Ring
25%inclusion1.65K decks6.61K decks
11%synergy
Wishclaw Talisman
21%inclusion1.40K decks6.61K decks
13%synergy
Mesmeric Orb
15%inclusion1.02K decks6.61K decks
14%synergy
Cloud Key
9.3%inclusion614 decks6.61K decks
6%synergy
Lightning Greaves
8.2%inclusion539 decks6.61K decks
-14%synergy
Swiftfoot Boots
5.5%inclusion362 decks6.61K decks
-18%synergy
Keys to the House
5.3%inclusion349 decks6.59K decks
5%synergy
Enchantments
Dance of the Dead
40%inclusion2.63K decks6.61K decks
38%synergy
Secret Arcade // Dusty Parlor
37%inclusion2.43K decks6.61K decks
32%synergy
Amphibian Downpour
36%inclusion2.36K decks6.61K decks
31%synergy
Propaganda
34%inclusion2.26K decks6.61K decks
7%synergy
Sigil of the Empty Throne
33%inclusion2.21K decks6.61K decks
27%synergy
Grasp of Fate
30%inclusion1.98K decks6.61K decks
24%synergy
Seal of Cleansing
29%inclusion1.90K decks6.61K decks
27%synergy
Ghostly Prison
29%inclusion1.89K decks6.61K decks
7%synergy
Cemetery Tampering
28%inclusion1.85K decks6.61K decks
27%synergy
Monologue Tax
25%inclusion1.65K decks6.61K decks
19%synergy
Starfield of Nyx
25%inclusion1.65K decks6.61K decks
21%synergy
Necropotence
25%inclusion1.63K decks6.61K decks
18%synergy
Estrid's Invocation
23%inclusion1.51K decks6.61K decks
18%synergy
Touch the Spirit Realm
22%inclusion1.43K decks6.61K decks
19%synergy
The Meathook Massacre
21%inclusion1.42K decks6.61K decks
18%synergy
Cacophony Unleashed
21%inclusion1.37K decks6.61K decks
19%synergy
Shark Typhoon
21%inclusion1.36K decks6.61K decks
15%synergy
Defiled Crypt // Cadaver Lab
20%inclusion1.34K decks6.59K decks
20%synergy
Darksteel Mutation
20%inclusion1.34K decks6.61K decks
14%synergy
Tinybones Joins Up
20%inclusion1.31K decks6.61K decks
19%synergy
Stillness in Motion
18%inclusion596 decks3.38K decks
17%synergy
All That Glitters
17%inclusion1.12K decks6.61K decks
8%synergy
Static Prison
17%inclusion1.11K decks6.61K decks
16%synergy
Polluted Cistern // Dim Oubliette
17%inclusion1.09K decks6.60K decks
16%synergy
Timely Ward
16%inclusion1.07K decks6.61K decks
11%synergy
Extravagant Replication
16%inclusion1.07K decks6.61K decks
11%synergy
The Tale of Tamiyo
16%inclusion1.04K decks6.61K decks
15%synergy
Phyrexian Arena
16%inclusion1.03K decks6.61K decks
2%synergy
Copy Enchantment
16%inclusion1.03K decks6.61K decks
11%synergy
Seal of Removal
16%inclusion1.03K decks6.61K decks
15%synergy
Ethereal Armor
15%inclusion992 decks6.61K decks
10%synergy
Out of the Tombs
15%inclusion985 decks6.61K decks
14%synergy
Black Market Connections
15%inclusion981 decks6.61K decks
1%synergy
Greater Auramancy
15%inclusion972 decks6.61K decks
10%synergy
Imprisoned in the Moon
14%inclusion939 decks6.61K decks
8%synergy
Hallowed Haunting
13%inclusion892 decks6.61K decks
11%synergy
Bottomless Pool // Locker Room
13%inclusion877 decks6.61K decks
11%synergy
The Eldest Reborn
13%inclusion867 decks6.61K decks
11%synergy
Leyline of Anticipation
13%inclusion866 decks6.61K decks
9%synergy
Restricted Office // Lecture Hall
13%inclusion847 decks6.61K decks
11%synergy
Trouble in Pairs
13%inclusion847 decks6.61K decks
7%synergy
Mirror Room // Fractured Realm
13%inclusion831 decks6.61K decks
10%synergy
Cramped Vents // Access Maze
13%inclusion827 decks6.61K decks
10%synergy
Court of Cunning
12%inclusion797 decks6.61K decks
11%synergy
Copy Artifact
11%inclusion753 decks6.61K decks
10%synergy
Sheltered by Ghosts
11%inclusion745 decks6.61K decks
9%synergy
Teval's Judgment
10%inclusion360 decks3.46K decks
10%synergy
Dazzling Theater // Prop Room
10%inclusion685 decks6.59K decks
9%synergy
One with the Multiverse
10%inclusion685 decks6.61K decks
6%synergy
Central Elevator // Promising Stairs
10%inclusion675 decks6.61K decks
10%synergy
Battles
Invasion of Theros
6.1%inclusion403 decks6.61K decks
4%synergy
Planeswalkers
Teferi, Time Raveler
19%inclusion1.26K decks6.61K decks
11%synergy
Utility Lands
Hall of Heliod's Generosity
48%inclusion3.17K decks6.61K decks
35%synergy
Otawara, Soaring City
34%inclusion2.24K decks6.61K decks
15%synergy
Bojuka Bog
32%inclusion2.08K decks6.61K decks
4%synergy
Urza's Saga
16%inclusion1.04K decks6.61K decks
4%synergy
Cephalid Coliseum
14%inclusion949 decks6.61K decks
11%synergy
Reliquary Tower
13%inclusion858 decks6.61K decks
-21%synergy
Takenuma, Abandoned Mire
13%inclusion845 decks6.61K decks
6%synergy
Halimar Depths
10%inclusion680 decks6.61K decks
6%synergy
Emergence Zone
10%inclusion653 decks6.61K decks
8%synergy
Urborg, Tomb of Yawgmoth
10%inclusion639 decks6.61K decks
-4%synergy
Minamo, School at Water's Edge
9.3%inclusion615 decks6.61K decks
5%synergy
Serra's Sanctum
9.2%inclusion609 decks6.61K decks
7%synergy
Mana Artifacts
Sol Ring
91%inclusion6K decks6.61K decks
1%synergy
Arcane Signet
91%inclusion5.99K decks6.61K decks
3%synergy
Talisman of Dominance
59%inclusion3.88K decks6.61K decks
9%synergy
Talisman of Progress
51%inclusion3.35K decks6.61K decks
8%synergy
Fellwar Stone
44%inclusion2.91K decks6.61K decks
10%synergy
Talisman of Hierarchy
44%inclusion2.90K decks6.61K decks
0%synergy
Azorius Signet
34%inclusion2.22K decks6.61K decks
1%synergy
Orzhov Signet
32%inclusion2.12K decks6.61K decks
-2%synergy
Lotus Petal
27%inclusion1.80K decks6.61K decks
16%synergy
Chrome Mox
24%inclusion1.61K decks6.61K decks
15%synergy
Dimir Signet
24%inclusion1.58K decks6.61K decks
-8%synergy
Mox Diamond
20%inclusion1.35K decks6.61K decks
13%synergy
Mox Opal
20%inclusion1.32K decks6.61K decks
11%synergy
Lion's Eye Diamond
16%inclusion1.03K decks6.61K decks
13%synergy
Mind Stone
15%inclusion991 decks6.61K decks
2%synergy
Commander's Sphere
12%inclusion798 decks6.61K decks
-7%synergy
Mox Amber
11%inclusion726 decks6.61K decks
5%synergy
Grim Monolith
9.0%inclusion596 decks6.61K decks
5%synergy
Thought Vessel
6.6%inclusion433 decks6.61K decks
-18%synergy
Chromatic Lantern
6.0%inclusion394 decks6.61K decks
-7%synergy
Lands
Command Tower
94%inclusion6.20K decks6.61K decks
1%synergy
Island
85%inclusion5.62K decks6.61K decks
-8%synergy
Swamp
82%inclusion5.44K decks6.61K decks
-9%synergy
Plains
81%inclusion5.33K decks6.61K decks
-11%synergy
Watery Grave
58%inclusion3.86K decks6.61K decks
8%synergy
Godless Shrine
58%inclusion3.85K decks6.61K decks
8%synergy
Hallowed Fountain
58%inclusion3.83K decks6.61K decks
9%synergy
Exotic Orchard
55%inclusion3.66K decks6.61K decks
-3%synergy
Flooded Strand
53%inclusion3.48K decks6.61K decks
15%synergy
Polluted Delta
52%inclusion3.46K decks6.61K decks
15%synergy
Marsh Flats
50%inclusion3.27K decks6.61K decks
13%synergy
Arcane Sanctum
46%inclusion3.04K decks6.61K decks
-9%synergy
Caves of Koilos
44%inclusion2.94K decks6.61K decks
9%synergy
Adarkar Wastes
43%inclusion2.87K decks6.61K decks
13%synergy
Underground River
42%inclusion2.75K decks6.61K decks
9%synergy
Morphic Pool
40%inclusion2.67K decks6.61K decks
6%synergy
Sea of Clouds
40%inclusion2.62K decks6.61K decks
4%synergy
Vault of Champions
37%inclusion2.43K decks6.61K decks
4%synergy
Undercity Sewers
35%inclusion2.30K decks6.61K decks
21%synergy
Raffine's Tower
34%inclusion2.24K decks6.61K decks
-7%synergy
Glacial Fortress
29%inclusion1.91K decks6.61K decks
-11%synergy
City of Brass
29%inclusion1.89K decks6.61K decks
13%synergy
Scrubland
28%inclusion1.83K decks6.61K decks
12%synergy
Tundra
28%inclusion1.83K decks6.61K decks
12%synergy
Meticulous Archive
28%inclusion1.83K decks6.61K decks
14%synergy
Isolated Chapel
28%inclusion1.82K decks6.61K decks
-11%synergy
Underground Sea
27%inclusion1.80K decks6.61K decks
11%synergy
Mana Confluence
27%inclusion1.77K decks6.61K decks
13%synergy
Bloodstained Mire
26%inclusion1.74K decks6.61K decks
15%synergy
Misty Rainforest
26%inclusion1.72K decks6.61K decks
15%synergy
Shadowy Backstreet
26%inclusion1.70K decks6.61K decks
13%synergy
Verdant Catacombs
24%inclusion1.60K decks6.61K decks
14%synergy
Drowned Catacomb
24%inclusion1.58K decks6.61K decks
-12%synergy
Scalding Tarn
24%inclusion1.55K decks6.61K decks
12%synergy
Prairie Stream
23%inclusion1.52K decks6.61K decks
-18%synergy
Windswept Heath
23%inclusion1.50K decks6.61K decks
13%synergy
Valgavoth's Lair
23%inclusion1.49K decks6.61K decks
20%synergy
Gemstone Caverns
22%inclusion1.49K decks6.61K decks
15%synergy
Evolving Wilds
22%inclusion1.47K decks6.61K decks
-3%synergy
Terramorphic Expanse
22%inclusion1.43K decks6.61K decks
5%synergy
Sunken Hollow
22%inclusion1.42K decks6.61K decks
-18%synergy
Temple of Enlightenment
21%inclusion1.40K decks6.61K decks
5%synergy
Temple of Silence
21%inclusion1.38K decks6.61K decks
1%synergy
Arid Mesa
21%inclusion1.36K decks6.61K decks
10%synergy
Temple of Deceit
20%inclusion1.34K decks6.61K decks
2%synergy
Obscura Storefront
20%inclusion1.30K decks6.61K decks
9%synergy
Tainted Field
19%inclusion1.23K decks6.61K decks
12%synergy
Azorius Chancery
18%inclusion1.20K decks6.61K decks
4%synergy
Tainted Isle
18%inclusion1.20K decks6.61K decks
12%synergy
Dimir Aqueduct
18%inclusion1.17K decks6.61K decks
4%synergy