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
7.0%inclusion37 decks530 decks
6%synergy
Changing Loyalty
4.0%inclusion21 decks530 decks
3%synergy
Primary Research
3.6%inclusion19 decks530 decks
3%synergy
Exhibition Tidecaller
3.1%inclusion17 decks551 decks
3%synergy
Coercive Impetus
1.5%inclusion8 decks530 decks
1%synergy
High Synergy Cards
Ripples of Undeath
61%inclusion4.70K decks7.68K decks
59%synergy
Animate Dead
67%inclusion5.17K decks7.68K decks
58%synergy
Dress Down
57%inclusion4.38K decks7.68K decks
55%synergy
Inquisitive Glimmer
58%inclusion4.46K decks7.68K decks
51%synergy
Necromancy
55%inclusion4.25K decks7.68K decks
51%synergy
Mesa Enchantress
53%inclusion4.07K decks7.68K decks
44%synergy
Entity Tracker
50%inclusion3.82K decks7.68K decks
44%synergy
Starfield Mystic
50%inclusion3.83K decks7.68K decks
43%synergy
Gravebreaker Lamia
43%inclusion3.33K decks7.68K decks
42%synergy
Demon of Fate's Design
46%inclusion3.52K decks7.68K decks
40%synergy
Top Cards
Swords to Plowshares
61%inclusion4.68K decks7.68K decks
-7%synergy
Mystic Remora
59%inclusion4.52K decks7.68K decks
38%synergy
Sevinne's Reclamation
47%inclusion3.61K decks7.68K decks
38%synergy
Mirrormade
46%inclusion3.56K decks7.68K decks
37%synergy
Entomb
44%inclusion3.35K decks7.68K decks
37%synergy
Fear of Sleep Paralysis
42%inclusion3.24K decks7.68K decks
37%synergy
Doomwake Giant
42%inclusion3.19K decks7.68K decks
36%synergy
Blind Obedience
41%inclusion3.13K decks7.68K decks
29%synergy
Sphere of Safety
41%inclusion3.12K decks7.68K decks
31%synergy
Scrabbling Skullcrab
40%inclusion3.07K decks7.68K decks
39%synergy
Game Changers
Smothering Tithe
50%inclusion3.86K decks7.68K decks
20%synergy
Rhystic Study
48%inclusion3.66K decks7.68K decks
17%synergy
Enlightened Tutor
37%inclusion2.85K decks7.68K decks
18%synergy
Demonic Tutor
32%inclusion2.42K decks7.68K decks
11%synergy
Vampiric Tutor
29%inclusion2.22K decks7.68K decks
12%synergy
Thassa's Oracle
29%inclusion2.20K decks7.68K decks
20%synergy
Ancient Tomb
25%inclusion1.95K decks7.68K decks
13%synergy
Mana Vault
25%inclusion1.90K decks7.68K decks
16%synergy
Force of Will
25%inclusion1.89K decks7.68K decks
12%synergy
Fierce Guardianship
25%inclusion1.88K decks7.68K decks
4%synergy
Creatures
Ondu Spiritdancer
37%inclusion2.84K decks7.68K decks
31%synergy
Overlord of the Floodpits
36%inclusion2.75K decks7.68K decks
32%synergy
Overlord of the Balemurk
34%inclusion2.62K decks7.68K decks
32%synergy
Abdel Adrian, Gorion's Ward
34%inclusion2.62K decks7.68K decks
32%synergy
Victor, Valgavoth's Seneschal
33%inclusion2.55K decks7.68K decks
31%synergy
Esper Sentinel
33%inclusion2.54K decks7.68K decks
6%synergy
Fear of Impostors
30%inclusion2.34K decks7.68K decks
29%synergy
Zur, Eternal Schemer
29%inclusion2.26K decks7.68K decks
26%synergy
Grand Abolisher
27%inclusion2.10K decks7.68K decks
13%synergy
Lotho, Corrupt Shirriff
27%inclusion2.04K decks7.68K decks
10%synergy
Ghostly Dancers
24%inclusion1.86K decks7.68K decks
22%synergy
Zur the Enchanter
23%inclusion1.77K decks7.68K decks
18%synergy
Silent Hallcreeper
23%inclusion1.76K decks7.68K decks
18%synergy
Valley Floodcaller
22%inclusion1.73K decks7.68K decks
19%synergy
Orcish Bowmasters
22%inclusion1.72K decks7.68K decks
12%synergy
Soaring Lightbringer
22%inclusion1.71K decks7.68K decks
18%synergy
Enduring Curiosity
21%inclusion1.59K decks7.68K decks
13%synergy
Hullbreaker Horror
20%inclusion1.56K decks7.68K decks
14%synergy
Grim Guardian
20%inclusion1.55K decks7.68K decks
18%synergy
Moon-Blessed Cleric
20%inclusion1.54K decks7.68K decks
15%synergy
Heliod, the Radiant Dawn
20%inclusion1.53K decks7.68K decks
16%synergy
Ranger-Captain of Eos
19%inclusion1.48K decks7.68K decks
13%synergy
Aminatou, Veil Piercer
19%inclusion1.43K decks7.68K decks
17%synergy
Displacer Kitten
18%inclusion1.37K decks7.68K decks
11%synergy
Archon of Sun's Grace
17%inclusion1.33K decks7.68K decks
13%synergy
Opposition Agent
15%inclusion1.15K decks7.68K decks
7%synergy
Athreos, Shroud-Veiled
14%inclusion1.05K decks7.68K decks
9%synergy
Mindwrack Harpy
13%inclusion1.03K decks7.68K decks
13%synergy
Ledger Shredder
13%inclusion1.02K decks7.68K decks
5%synergy
Lurrus of the Dream-Den
13%inclusion998 decks7.68K decks
11%synergy
Archetype of Imagination
12%inclusion941 decks7.68K decks
8%synergy
Overlord of the Mistmoors
12%inclusion936 decks7.68K decks
10%synergy
Drannith Magistrate
12%inclusion920 decks7.68K decks
4%synergy
Sage of Mysteries
12%inclusion902 decks7.68K decks
11%synergy
Hedron Crab
12%inclusion898 decks7.68K decks
11%synergy
Mockingbird
11%inclusion856 decks7.68K decks
7%synergy
Alseid of Life's Bounty
11%inclusion856 decks7.68K decks
10%synergy
Ancient Cellarspawn
11%inclusion831 decks7.68K decks
8%synergy
Voice of Victory
11%inclusion496 decks4.61K decks
2%synergy
Archivist of Oghma
10%inclusion804 decks7.68K decks
4%synergy
Skullsnap Nuisance
10%inclusion796 decks7.68K decks
10%synergy
Balemurk Leech
10%inclusion780 decks7.68K decks
10%synergy
Talion, the Kindly Lord
10%inclusion779 decks7.68K decks
3%synergy
Spirited Companion
9.5%inclusion728 decks7.68K decks
8%synergy
Gremlin Tamer
9.2%inclusion704 decks7.68K decks
8%synergy
Auriok Salvagers
8.9%inclusion687 decks7.68K decks
9%synergy
Nashi, Searcher in the Dark
8.7%inclusion666 decks7.68K decks
8%synergy
Phyrexian Metamorph
8.3%inclusion641 decks7.68K decks
0%synergy
Wan Shi Tong, Librarian
8.0%inclusion182 decks2.27K decks
3%synergy
Fear of Infinity
7.5%inclusion578 decks7.68K decks
7%synergy
Instants
Dark Ritual
40%inclusion3.06K decks7.68K decks
20%synergy
An Offer You Can't Refuse
36%inclusion2.73K decks7.68K decks
8%synergy
Swan Song
32%inclusion2.44K decks7.68K decks
12%synergy
Path to Exile
30%inclusion2.32K decks7.68K decks
-12%synergy
Counterspell
30%inclusion2.29K decks7.68K decks
-12%synergy
Arcane Denial
26%inclusion2.03K decks7.68K decks
6%synergy
Silence
26%inclusion1.99K decks7.68K decks
16%synergy
Cyclonic Rift
23%inclusion1.79K decks7.68K decks
0%synergy
Force of Negation
23%inclusion1.74K decks7.68K decks
11%synergy
Flusterstorm
22%inclusion1.72K decks7.68K decks
14%synergy
Demonic Consultation
22%inclusion1.68K decks7.68K decks
14%synergy
Tainted Pact
22%inclusion1.67K decks7.68K decks
15%synergy
Mindbreak Trap
20%inclusion1.56K decks7.68K decks
14%synergy
Intuition
20%inclusion1.50K decks7.68K decks
18%synergy
Pact of Negation
19%inclusion1.49K decks7.68K decks
12%synergy
Mystical Tutor
19%inclusion1.48K decks7.68K decks
8%synergy
Borne Upon a Wind
19%inclusion1.44K decks7.68K decks
14%synergy
Mental Misstep
19%inclusion1.42K decks7.68K decks
12%synergy
Mana Drain
18%inclusion1.35K decks7.68K decks
0%synergy
Cabal Ritual
17%inclusion1.29K decks7.68K decks
13%synergy
Void Rend
15%inclusion1.19K decks7.68K decks
-19%synergy
Sink into Stupor
15%inclusion1.15K decks7.68K decks
2%synergy
Dovin's Veto
15%inclusion1.14K decks7.68K decks
-11%synergy
Thirst for Meaning
15%inclusion1.13K decks7.68K decks
13%synergy
Otherworldly Gaze
13%inclusion995 decks7.68K decks
11%synergy
Frantic Search
13%inclusion989 decks7.68K decks
-5%synergy
Inkshield
13%inclusion976 decks7.68K decks
3%synergy
Chain of Vapor
11%inclusion828 decks7.68K decks
8%synergy
Negate
10%inclusion778 decks7.68K decks
-6%synergy
Brainstorm
10%inclusion778 decks7.68K decks
-7%synergy
Into the Flood Maw
10%inclusion743 decks7.68K decks
6%synergy
Gifts Ungiven
9.4%inclusion723 decks7.68K decks
7%synergy
Anguished Unmaking
8.2%inclusion630 decks7.68K decks
-17%synergy
Teferi's Protection
6.6%inclusion510 decks7.68K decks
-10%synergy
Fell the Profane
6.4%inclusion495 decks7.68K decks
-2%synergy
Utter End
5.9%inclusion450 decks7.68K decks
-1%synergy
Ad Nauseam
5.6%inclusion427 decks7.68K decks
3%synergy
Deadly Rollick
5.4%inclusion414 decks7.68K decks
-10%synergy
Generous Gift
5.2%inclusion400 decks7.68K decks
-9%synergy
Retraction Helix
5.2%inclusion396 decks7.68K decks
4%synergy
Brain Freeze
5.1%inclusion392 decks7.68K decks
5%synergy
Sorceries
Redress Fate
30%inclusion2.28K decks7.68K decks
24%synergy
Windfall
27%inclusion2.09K decks7.68K decks
14%synergy
Reanimate
26%inclusion2.03K decks7.68K decks
10%synergy
Toxic Deluge
20%inclusion1.56K decks7.68K decks
1%synergy
Imperial Seal
18%inclusion1.35K decks7.68K decks
11%synergy
Extinguish All Hope
15%inclusion1.15K decks7.68K decks
13%synergy
Singularity Rupture
15%inclusion491 decks3.29K decks
13%synergy
Dance of the Manse
14%inclusion1.10K decks7.68K decks
11%synergy
Time Wipe
11%inclusion854 decks7.68K decks
5%synergy
Damn
10%inclusion787 decks7.68K decks
-10%synergy
Demonic Counsel
10%inclusion744 decks7.68K decks
9%synergy
Idyllic Tutor
9.2%inclusion709 decks7.68K decks
5%synergy
Glimpse the Unthinkable
9.1%inclusion697 decks7.68K decks
9%synergy
Lively Dirge
8.9%inclusion686 decks7.68K decks
8%synergy
Supreme Verdict
8.9%inclusion684 decks7.68K decks
-6%synergy
Resurgent Belief
8.7%inclusion671 decks7.68K decks
7%synergy
Beseech the Mirror
8.3%inclusion639 decks7.68K decks
4%synergy
Unmarked Grave
8.1%inclusion626 decks7.68K decks
7%synergy
Ponder
7.8%inclusion596 decks7.68K decks
-1%synergy
Replenish
7.5%inclusion579 decks7.68K decks
6%synergy
Buried Alive
7.2%inclusion556 decks7.68K decks
3%synergy
Space-Time Anomaly
7.2%inclusion233 decks3.23K decks
6%synergy
Mnemonic Betrayal
6.6%inclusion505 decks7.68K decks
4%synergy
Farewell
5.3%inclusion404 decks7.68K decks
-7%synergy
Utility Artifacts
The One Ring
22%inclusion1.72K decks7.68K decks
10%synergy
Wishclaw Talisman
20%inclusion1.52K decks7.68K decks
12%synergy
Mesmeric Orb
15%inclusion1.18K decks7.68K decks
14%synergy
Cloud Key
10%inclusion750 decks7.68K decks
6%synergy
Lightning Greaves
8.1%inclusion620 decks7.68K decks
-15%synergy
Keys to the House
5.7%inclusion440 decks7.66K decks
6%synergy
Swiftfoot Boots
5.5%inclusion426 decks7.68K decks
-19%synergy
Enchantments
Dance of the Dead
39%inclusion2.96K decks7.68K decks
36%synergy
Secret Arcade // Dusty Parlor
38%inclusion2.89K decks7.68K decks
33%synergy
Amphibian Downpour
37%inclusion2.82K decks7.68K decks
32%synergy
Propaganda
35%inclusion2.69K decks7.68K decks
7%synergy
Sigil of the Empty Throne
34%inclusion2.58K decks7.68K decks
28%synergy
Grasp of Fate
31%inclusion2.36K decks7.68K decks
25%synergy
Seal of Cleansing
30%inclusion2.29K decks7.68K decks
28%synergy
Ghostly Prison
29%inclusion2.26K decks7.68K decks
7%synergy
Cemetery Tampering
29%inclusion2.21K decks7.68K decks
28%synergy
Monologue Tax
26%inclusion1.98K decks7.68K decks
19%synergy
Starfield of Nyx
25%inclusion1.95K decks7.68K decks
21%synergy
Estrid's Invocation
24%inclusion1.85K decks7.68K decks
19%synergy
Necropotence
23%inclusion1.80K decks7.68K decks
17%synergy
Cacophony Unleashed
22%inclusion1.66K decks7.68K decks
20%synergy
The Meathook Massacre
21%inclusion1.64K decks7.68K decks
18%synergy
Touch the Spirit Realm
21%inclusion1.60K decks7.68K decks
18%synergy
Defiled Crypt // Cadaver Lab
21%inclusion1.57K decks7.66K decks
20%synergy
Shark Typhoon
20%inclusion1.56K decks7.68K decks
14%synergy
Darksteel Mutation
20%inclusion1.55K decks7.68K decks
14%synergy
Tinybones Joins Up
19%inclusion1.45K decks7.68K decks
18%synergy
Stillness in Motion
18%inclusion820 decks4.50K decks
18%synergy
All That Glitters
17%inclusion1.31K decks7.68K decks
8%synergy
Copy Enchantment
17%inclusion1.29K decks7.68K decks
12%synergy
Polluted Cistern // Dim Oubliette
17%inclusion1.28K decks7.68K decks
16%synergy
Extravagant Replication
17%inclusion1.28K decks7.68K decks
12%synergy
Timely Ward
16%inclusion1.26K decks7.68K decks
11%synergy
Static Prison
16%inclusion1.25K decks7.68K decks
16%synergy
The Tale of Tamiyo
16%inclusion1.24K decks7.68K decks
16%synergy
Seal of Removal
16%inclusion1.22K decks7.68K decks
15%synergy
Phyrexian Arena
16%inclusion1.22K decks7.68K decks
2%synergy
Ethereal Armor
16%inclusion1.21K decks7.68K decks
11%synergy
Black Market Connections
15%inclusion1.16K decks7.68K decks
0%synergy
Greater Auramancy
15%inclusion1.15K decks7.68K decks
11%synergy
Out of the Tombs
15%inclusion1.14K decks7.68K decks
14%synergy
Imprisoned in the Moon
15%inclusion1.13K decks7.68K decks
8%synergy
Hallowed Haunting
14%inclusion1.07K decks7.68K decks
12%synergy
Bottomless Pool // Locker Room
14%inclusion1.05K decks7.68K decks
12%synergy
Leyline of Anticipation
13%inclusion1.02K decks7.68K decks
9%synergy
Restricted Office // Lecture Hall
13%inclusion1.02K decks7.68K decks
11%synergy
The Eldest Reborn
13%inclusion998 decks7.68K decks
11%synergy
Mirror Room // Fractured Realm
13%inclusion988 decks7.68K decks
11%synergy
Cramped Vents // Access Maze
13%inclusion973 decks7.68K decks
10%synergy
Court of Cunning
12%inclusion936 decks7.68K decks
11%synergy
Trouble in Pairs
12%inclusion936 decks7.68K decks
7%synergy
Sheltered by Ghosts
12%inclusion884 decks7.68K decks
9%synergy
Central Elevator // Promising Stairs
11%inclusion832 decks7.68K decks
10%synergy
Dazzling Theater // Prop Room
11%inclusion813 decks7.66K decks
9%synergy
Copy Artifact
11%inclusion814 decks7.68K decks
10%synergy
Teval's Judgment
11%inclusion481 decks4.58K decks
10%synergy
One with the Multiverse
10%inclusion801 decks7.68K decks
6%synergy
Battles
Invasion of Theros
5.9%inclusion456 decks7.68K decks
4%synergy
Planeswalkers
Teferi, Time Raveler
17%inclusion1.34K decks7.68K decks
9%synergy
Utility Lands
Hall of Heliod's Generosity
48%inclusion3.70K decks7.68K decks
35%synergy
Otawara, Soaring City
33%inclusion2.50K decks7.68K decks
14%synergy
Bojuka Bog
32%inclusion2.46K decks7.68K decks
5%synergy
Urza's Saga
15%inclusion1.14K decks7.68K decks
3%synergy
Cephalid Coliseum
14%inclusion1.10K decks7.68K decks
11%synergy
Reliquary Tower
13%inclusion1.02K decks7.68K decks
-21%synergy
Takenuma, Abandoned Mire
13%inclusion964 decks7.68K decks
6%synergy
Halimar Depths
10%inclusion783 decks7.68K decks
6%synergy
Urborg, Tomb of Yawgmoth
10%inclusion748 decks7.68K decks
-3%synergy
Emergence Zone
9.3%inclusion717 decks7.68K decks
7%synergy
Serra's Sanctum
9.1%inclusion696 decks7.68K decks
7%synergy
Minamo, School at Water's Edge
8.4%inclusion646 decks7.68K decks
5%synergy
Mana Artifacts
Sol Ring
90%inclusion6.93K decks7.68K decks
0%synergy
Arcane Signet
90%inclusion6.92K decks7.68K decks
2%synergy
Talisman of Dominance
57%inclusion4.41K decks7.68K decks
8%synergy
Talisman of Progress
50%inclusion3.87K decks7.68K decks
6%synergy
Talisman of Hierarchy
44%inclusion3.37K decks7.68K decks
0%synergy
Fellwar Stone
43%inclusion3.29K decks7.68K decks
10%synergy
Azorius Signet
34%inclusion2.62K decks7.68K decks
4%synergy
Orzhov Signet
32%inclusion2.49K decks7.68K decks
0%synergy
Lotus Petal
25%inclusion1.96K decks7.68K decks
15%synergy
Dimir Signet
24%inclusion1.87K decks7.68K decks
-6%synergy
Chrome Mox
22%inclusion1.73K decks7.68K decks
13%synergy
Mox Diamond
19%inclusion1.45K decks7.68K decks
12%synergy
Mox Opal
18%inclusion1.42K decks7.68K decks
10%synergy
Mind Stone
15%inclusion1.11K decks7.68K decks
2%synergy
Lion's Eye Diamond
14%inclusion1.10K decks7.68K decks
12%synergy
Commander's Sphere
12%inclusion910 decks7.68K decks
-6%synergy
Mox Amber
10%inclusion787 decks7.68K decks
4%synergy
Grim Monolith
8.5%inclusion650 decks7.68K decks
5%synergy
Thought Vessel
6.4%inclusion490 decks7.68K decks
-19%synergy
Chromatic Lantern
5.9%inclusion454 decks7.68K decks
-7%synergy
Lands
Command Tower
94%inclusion7.20K decks7.68K decks
1%synergy
Island
86%inclusion6.59K decks7.68K decks
-7%synergy
Swamp
83%inclusion6.40K decks7.68K decks
-8%synergy
Plains
82%inclusion6.29K decks7.68K decks
-10%synergy
Godless Shrine
59%inclusion4.50K decks7.68K decks
7%synergy
Hallowed Fountain
58%inclusion4.49K decks7.68K decks
8%synergy
Watery Grave
58%inclusion4.49K decks7.68K decks
8%synergy
Exotic Orchard
55%inclusion4.25K decks7.68K decks
-3%synergy
Flooded Strand
52%inclusion3.96K decks7.68K decks
13%synergy
Polluted Delta
51%inclusion3.93K decks7.68K decks
13%synergy
Marsh Flats
48%inclusion3.71K decks7.68K decks
12%synergy
Arcane Sanctum
47%inclusion3.60K decks7.68K decks
-7%synergy
Caves of Koilos
45%inclusion3.45K decks7.68K decks
9%synergy
Adarkar Wastes
44%inclusion3.39K decks7.68K decks
12%synergy
Underground River
42%inclusion3.22K decks7.68K decks
8%synergy
Morphic Pool
40%inclusion3.05K decks7.68K decks
6%synergy
Sea of Clouds
39%inclusion3K decks7.68K decks
4%synergy
Vault of Champions
36%inclusion2.78K decks7.68K decks
4%synergy
Undercity Sewers
35%inclusion2.65K decks7.68K decks
20%synergy
Raffine's Tower
34%inclusion2.64K decks7.68K decks
-6%synergy
Glacial Fortress
30%inclusion2.34K decks7.68K decks
-12%synergy
Isolated Chapel
29%inclusion2.23K decks7.68K decks
-12%synergy
Meticulous Archive
28%inclusion2.12K decks7.68K decks
14%synergy
City of Brass
27%inclusion2.11K decks7.68K decks
12%synergy
Scrubland
26%inclusion2.03K decks7.68K decks
11%synergy
Tundra
26%inclusion2.02K decks7.68K decks
10%synergy
Shadowy Backstreet
26%inclusion2K decks7.68K decks
13%synergy
Underground Sea
26%inclusion1.99K decks7.68K decks
10%synergy
Mana Confluence
25%inclusion1.96K decks7.68K decks
12%synergy
Drowned Catacomb
25%inclusion1.93K decks7.68K decks
-12%synergy
Bloodstained Mire
25%inclusion1.89K decks7.68K decks
14%synergy
Misty Rainforest
24%inclusion1.87K decks7.68K decks
14%synergy
Prairie Stream
24%inclusion1.81K decks7.68K decks
-17%synergy
Verdant Catacombs
23%inclusion1.74K decks7.68K decks
13%synergy
Valgavoth's Lair
23%inclusion1.74K decks7.68K decks
20%synergy
Sunken Hollow
22%inclusion1.72K decks7.68K decks
-17%synergy
Evolving Wilds
22%inclusion1.70K decks7.68K decks
-3%synergy
Scalding Tarn
22%inclusion1.70K decks7.68K decks
11%synergy
Windswept Heath
21%inclusion1.63K decks7.68K decks
12%synergy
Terramorphic Expanse
21%inclusion1.62K decks7.68K decks
5%synergy
Gemstone Caverns
21%inclusion1.61K decks7.68K decks
13%synergy
Temple of Enlightenment
21%inclusion1.61K decks7.68K decks
5%synergy
Temple of Silence
20%inclusion1.57K decks7.68K decks
2%synergy
Temple of Deceit
20%inclusion1.51K decks7.68K decks
2%synergy
Arid Mesa
19%inclusion1.49K decks7.68K decks
10%synergy
Obscura Storefront
19%inclusion1.48K decks7.68K decks
10%synergy
Tainted Field
19%inclusion1.43K decks7.68K decks
12%synergy
Azorius Chancery
18%inclusion1.40K decks7.68K decks
5%synergy
Tainted Isle
18%inclusion1.39K decks7.68K decks
12%synergy
Dimir Aqueduct
17%inclusion1.34K decks7.68K decks
4%synergy