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
7.5%inclusion71 decks945 decks
2%synergy
Chakra Meditation
1.8%inclusion15 decks835 decks
2%synergy
The Legend of Yangchen
1.3%inclusion12 decks903 decks
1%synergy
The Rise of Sozin
1.1%inclusion20 decks1.76K decks
1%synergy
Aang's Iceberg
1.1%inclusion19 decks1.76K decks
1%synergy
High Synergy Cards
Animate Dead
68%inclusion4.55K decks6.67K decks
59%synergy
Ripples of Undeath
61%inclusion4.06K decks6.67K decks
58%synergy
Dress Down
58%inclusion3.87K decks6.67K decks
56%synergy
Necromancy
56%inclusion3.76K decks6.67K decks
52%synergy
Inquisitive Glimmer
56%inclusion3.76K decks6.67K decks
49%synergy
Mesa Enchantress
52%inclusion3.48K decks6.67K decks
43%synergy
Starfield Mystic
49%inclusion3.27K decks6.67K decks
42%synergy
Entity Tracker
49%inclusion3.24K decks6.67K decks
42%synergy
Gravebreaker Lamia
42%inclusion2.79K decks6.67K decks
41%synergy
Demon of Fate's Design
45%inclusion3K decks6.67K decks
39%synergy
Top Cards
Swords to Plowshares
62%inclusion4.15K decks6.67K decks
-6%synergy
Mystic Remora
60%inclusion4.02K decks6.67K decks
39%synergy
Sevinne's Reclamation
47%inclusion3.15K decks6.67K decks
38%synergy
Mirrormade
45%inclusion3.02K decks6.67K decks
35%synergy
Entomb
44%inclusion2.96K decks6.67K decks
37%synergy
Blind Obedience
42%inclusion2.79K decks6.67K decks
29%synergy
Fear of Sleep Paralysis
42%inclusion2.78K decks6.67K decks
36%synergy
Doomwake Giant
41%inclusion2.73K decks6.67K decks
35%synergy
Dark Ritual
41%inclusion2.72K decks6.67K decks
21%synergy
Dance of the Dead
40%inclusion2.64K decks6.67K decks
37%synergy
Game Changers
Smothering Tithe
52%inclusion3.48K decks6.67K decks
20%synergy
Rhystic Study
50%inclusion3.33K decks6.67K decks
18%synergy
Enlightened Tutor
39%inclusion2.60K decks6.67K decks
19%synergy
Demonic Tutor
33%inclusion2.21K decks6.67K decks
12%synergy
Thassa's Oracle
31%inclusion2.05K decks6.67K decks
21%synergy
Vampiric Tutor
31%inclusion2.04K decks6.67K decks
13%synergy
Ancient Tomb
27%inclusion1.82K decks6.67K decks
14%synergy
Fierce Guardianship
27%inclusion1.78K decks6.67K decks
6%synergy
Force of Will
26%inclusion1.77K decks6.67K decks
14%synergy
Mana Vault
26%inclusion1.76K decks6.67K decks
17%synergy
Creatures
Scrabbling Skullcrab
39%inclusion2.59K decks6.67K decks
38%synergy
Ondu Spiritdancer
36%inclusion2.43K decks6.67K decks
30%synergy
Abdel Adrian, Gorion's Ward
36%inclusion2.39K decks6.67K decks
34%synergy
Esper Sentinel
34%inclusion2.29K decks6.67K decks
7%synergy
Overlord of the Floodpits
34%inclusion2.29K decks6.67K decks
31%synergy
Overlord of the Balemurk
34%inclusion2.25K decks6.67K decks
32%synergy
Victor, Valgavoth's Seneschal
32%inclusion2.14K decks6.67K decks
30%synergy
Grand Abolisher
29%inclusion1.94K decks6.67K decks
15%synergy
Fear of Impostors
29%inclusion1.93K decks6.67K decks
27%synergy
Zur, Eternal Schemer
28%inclusion1.87K decks6.67K decks
25%synergy
Lotho, Corrupt Shirriff
28%inclusion1.84K decks6.67K decks
11%synergy
Orcish Bowmasters
24%inclusion1.62K decks6.67K decks
13%synergy
Valley Floodcaller
24%inclusion1.60K decks6.67K decks
20%synergy
Ghostly Dancers
24%inclusion1.59K decks6.67K decks
21%synergy
Zur the Enchanter
22%inclusion1.49K decks6.67K decks
17%synergy
Soaring Lightbringer
22%inclusion1.48K decks6.67K decks
17%synergy
Hullbreaker Horror
22%inclusion1.46K decks6.67K decks
16%synergy
Silent Hallcreeper
22%inclusion1.44K decks6.67K decks
17%synergy
Ranger-Captain of Eos
21%inclusion1.38K decks6.67K decks
14%synergy
Enduring Curiosity
21%inclusion1.38K decks6.67K decks
13%synergy
Heliod, the Radiant Dawn
20%inclusion1.34K decks6.67K decks
16%synergy
Moon-Blessed Cleric
20%inclusion1.33K decks6.67K decks
15%synergy
Displacer Kitten
20%inclusion1.31K decks6.67K decks
12%synergy
Grim Guardian
19%inclusion1.27K decks6.67K decks
17%synergy
Aminatou, Veil Piercer
18%inclusion1.23K decks6.67K decks
17%synergy
Archon of Sun's Grace
17%inclusion1.15K decks6.67K decks
13%synergy
Opposition Agent
16%inclusion1.09K decks6.67K decks
8%synergy
Ledger Shredder
14%inclusion929 decks6.67K decks
5%synergy
Lurrus of the Dream-Den
14%inclusion916 decks6.67K decks
12%synergy
Mindwrack Harpy
14%inclusion915 decks6.67K decks
13%synergy
Athreos, Shroud-Veiled
14%inclusion906 decks6.67K decks
9%synergy
Drannith Magistrate
13%inclusion885 decks6.67K decks
5%synergy
Archetype of Imagination
12%inclusion806 decks6.67K decks
7%synergy
Overlord of the Mistmoors
12%inclusion792 decks6.67K decks
10%synergy
Mockingbird
12%inclusion779 decks6.67K decks
7%synergy
Voice of Victory
11%inclusion393 decks3.43K decks
3%synergy
Archivist of Oghma
11%inclusion760 decks6.67K decks
5%synergy
Talion, the Kindly Lord
11%inclusion758 decks6.67K decks
3%synergy
Ancient Cellarspawn
11%inclusion754 decks6.67K decks
8%synergy
Sage of Mysteries
11%inclusion743 decks6.67K decks
11%synergy
Alseid of Life's Bounty
11%inclusion743 decks6.67K decks
10%synergy
Hedron Crab
11%inclusion723 decks6.67K decks
10%synergy
Balemurk Leech
10%inclusion677 decks6.67K decks
9%synergy
Skullsnap Nuisance
10%inclusion669 decks6.67K decks
10%synergy
Spirited Companion
10%inclusion651 decks6.67K decks
8%synergy
Auriok Salvagers
10%inclusion650 decks6.67K decks
9%synergy
Phyrexian Metamorph
9.4%inclusion625 decks6.67K decks
1%synergy
Gremlin Tamer
9.1%inclusion607 decks6.67K decks
8%synergy
Nashi, Searcher in the Dark
8.9%inclusion593 decks6.67K decks
8%synergy
Pollywog Prodigy
7.8%inclusion518 decks6.67K decks
4%synergy
Instants
An Offer You Can't Refuse
36%inclusion2.39K decks6.67K decks
9%synergy
Swan Song
33%inclusion2.17K decks6.67K decks
13%synergy
Path to Exile
30%inclusion2.01K decks6.67K decks
-12%synergy
Counterspell
29%inclusion1.92K decks6.67K decks
-13%synergy
Silence
27%inclusion1.82K decks6.67K decks
17%synergy
Arcane Denial
26%inclusion1.75K decks6.67K decks
6%synergy
Cyclonic Rift
25%inclusion1.67K decks6.67K decks
1%synergy
Force of Negation
24%inclusion1.63K decks6.67K decks
13%synergy
Flusterstorm
24%inclusion1.59K decks6.67K decks
16%synergy
Tainted Pact
24%inclusion1.57K decks6.67K decks
16%synergy
Demonic Consultation
23%inclusion1.56K decks6.67K decks
15%synergy
Mindbreak Trap
22%inclusion1.46K decks6.67K decks
15%synergy
Intuition
21%inclusion1.41K decks6.67K decks
19%synergy
Mystical Tutor
21%inclusion1.39K decks6.67K decks
9%synergy
Pact of Negation
21%inclusion1.39K decks6.67K decks
13%synergy
Borne Upon a Wind
20%inclusion1.33K decks6.67K decks
15%synergy
Mental Misstep
20%inclusion1.32K decks6.67K decks
13%synergy
Mana Drain
18%inclusion1.23K decks6.67K decks
1%synergy
Cabal Ritual
18%inclusion1.17K decks6.67K decks
14%synergy
Sink into Stupor
15%inclusion1.02K decks6.67K decks
3%synergy
Void Rend
15%inclusion990 decks6.67K decks
-19%synergy
Thirst for Meaning
15%inclusion973 decks6.67K decks
13%synergy
Dovin's Veto
14%inclusion947 decks6.67K decks
-11%synergy
Otherworldly Gaze
13%inclusion863 decks6.67K decks
11%synergy
Inkshield
13%inclusion841 decks6.67K decks
3%synergy
Frantic Search
12%inclusion815 decks6.67K decks
-5%synergy
Chain of Vapor
12%inclusion774 decks6.67K decks
8%synergy
Brainstorm
10%inclusion692 decks6.67K decks
-7%synergy
Into the Flood Maw
10%inclusion670 decks6.67K decks
6%synergy
Negate
10%inclusion668 decks6.67K decks
-7%synergy
Gifts Ungiven
8.5%inclusion567 decks6.67K decks
6%synergy
Anguished Unmaking
8.4%inclusion560 decks6.67K decks
-16%synergy
Teferi's Protection
7.1%inclusion471 decks6.67K decks
-10%synergy
Fell the Profane
6.4%inclusion426 decks6.67K decks
-2%synergy
Ad Nauseam
5.9%inclusion392 decks6.67K decks
3%synergy
Utter End
5.7%inclusion378 decks6.67K decks
-1%synergy
Generous Gift
5.5%inclusion367 decks6.67K decks
-9%synergy
Deadly Rollick
5.4%inclusion360 decks6.67K decks
-9%synergy
Retraction Helix
5.4%inclusion360 decks6.67K decks
5%synergy
Brain Freeze
5.4%inclusion359 decks6.67K decks
5%synergy
Sorceries
Redress Fate
30%inclusion1.98K decks6.67K decks
23%synergy
Windfall
28%inclusion1.86K decks6.67K decks
14%synergy
Reanimate
26%inclusion1.75K decks6.67K decks
10%synergy
Toxic Deluge
22%inclusion1.46K decks6.67K decks
2%synergy
Imperial Seal
19%inclusion1.27K decks6.67K decks
12%synergy
Singularity Rupture
15%inclusion312 decks2.07K decks
13%synergy
Extinguish All Hope
14%inclusion954 decks6.67K decks
13%synergy
Dance of the Manse
14%inclusion950 decks6.67K decks
11%synergy
Time Wipe
12%inclusion774 decks6.67K decks
5%synergy
Damn
11%inclusion709 decks6.67K decks
-10%synergy
Demonic Counsel
10%inclusion688 decks6.67K decks
9%synergy
Idyllic Tutor
9.2%inclusion611 decks6.67K decks
5%synergy
Supreme Verdict
9.0%inclusion602 decks6.67K decks
-6%synergy
Lively Dirge
8.9%inclusion593 decks6.67K decks
8%synergy
Resurgent Belief
8.7%inclusion582 decks6.67K decks
7%synergy
Beseech the Mirror
8.6%inclusion572 decks6.67K decks
5%synergy
Unmarked Grave
8.3%inclusion557 decks6.67K decks
7%synergy
Glimpse the Unthinkable
8.3%inclusion556 decks6.67K decks
8%synergy
Space-Time Anomaly
7.8%inclusion157 decks2K decks
6%synergy
Ponder
7.8%inclusion521 decks6.67K decks
-1%synergy
Replenish
7.5%inclusion497 decks6.67K decks
6%synergy
Buried Alive
7.2%inclusion479 decks6.67K decks
3%synergy
Mnemonic Betrayal
6.8%inclusion456 decks6.67K decks
4%synergy
Farewell
5.4%inclusion363 decks6.67K decks
-8%synergy
Utility Artifacts
The One Ring
25%inclusion1.66K decks6.67K decks
11%synergy
Wishclaw Talisman
21%inclusion1.40K decks6.67K decks
13%synergy
Mesmeric Orb
15%inclusion1.03K decks6.67K decks
14%synergy
Cloud Key
9.2%inclusion615 decks6.67K decks
6%synergy
Lightning Greaves
8.2%inclusion549 decks6.67K decks
-14%synergy
Swiftfoot Boots
5.5%inclusion365 decks6.67K decks
-18%synergy
Keys to the House
5.3%inclusion353 decks6.65K decks
5%synergy
Enchantments
Sphere of Safety
40%inclusion2.64K decks6.67K decks
30%synergy
Secret Arcade // Dusty Parlor
37%inclusion2.46K decks6.67K decks
32%synergy
Amphibian Downpour
36%inclusion2.37K decks6.67K decks
31%synergy
Propaganda
34%inclusion2.28K decks6.67K decks
8%synergy
Sigil of the Empty Throne
33%inclusion2.23K decks6.67K decks
27%synergy
Grasp of Fate
30%inclusion2K decks6.67K decks
24%synergy
Ghostly Prison
29%inclusion1.91K decks6.67K decks
7%synergy
Seal of Cleansing
29%inclusion1.91K decks6.67K decks
27%synergy
Cemetery Tampering
28%inclusion1.87K decks6.67K decks
27%synergy
Monologue Tax
25%inclusion1.67K decks6.67K decks
19%synergy
Starfield of Nyx
25%inclusion1.66K decks6.67K decks
21%synergy
Necropotence
25%inclusion1.65K decks6.67K decks
18%synergy
Estrid's Invocation
23%inclusion1.53K decks6.67K decks
18%synergy
Touch the Spirit Realm
22%inclusion1.45K decks6.67K decks
19%synergy
The Meathook Massacre
21%inclusion1.42K decks6.67K decks
18%synergy
Cacophony Unleashed
21%inclusion1.39K decks6.67K decks
19%synergy
Shark Typhoon
21%inclusion1.39K decks6.67K decks
15%synergy
Darksteel Mutation
20%inclusion1.36K decks6.67K decks
14%synergy
Defiled Crypt // Cadaver Lab
20%inclusion1.35K decks6.65K decks
20%synergy
Tinybones Joins Up
20%inclusion1.31K decks6.67K decks
18%synergy
Stillness in Motion
18%inclusion587 decks3.32K decks
17%synergy
All That Glitters
17%inclusion1.13K decks6.67K decks
8%synergy
Static Prison
17%inclusion1.13K decks6.67K decks
16%synergy
Polluted Cistern // Dim Oubliette
17%inclusion1.10K decks6.66K decks
16%synergy
Timely Ward
16%inclusion1.08K decks6.67K decks
11%synergy
Extravagant Replication
16%inclusion1.08K decks6.67K decks
11%synergy
The Tale of Tamiyo
16%inclusion1.07K decks6.67K decks
16%synergy
Copy Enchantment
16%inclusion1.05K decks6.67K decks
11%synergy
Phyrexian Arena
16%inclusion1.04K decks6.67K decks
2%synergy
Seal of Removal
16%inclusion1.04K decks6.67K decks
15%synergy
Out of the Tombs
15%inclusion1K decks6.67K decks
15%synergy
Ethereal Armor
15%inclusion998 decks6.67K decks
10%synergy
Black Market Connections
15%inclusion990 decks6.67K decks
1%synergy
Greater Auramancy
15%inclusion980 decks6.67K decks
10%synergy
Imprisoned in the Moon
14%inclusion939 decks6.67K decks
8%synergy
Hallowed Haunting
14%inclusion902 decks6.67K decks
11%synergy
The Eldest Reborn
13%inclusion890 decks6.67K decks
11%synergy
Bottomless Pool // Locker Room
13%inclusion890 decks6.67K decks
11%synergy
Leyline of Anticipation
13%inclusion877 decks6.67K decks
9%synergy
Trouble in Pairs
13%inclusion860 decks6.67K decks
7%synergy
Restricted Office // Lecture Hall
13%inclusion851 decks6.67K decks
11%synergy
Cramped Vents // Access Maze
13%inclusion841 decks6.67K decks
10%synergy
Mirror Room // Fractured Realm
12%inclusion833 decks6.67K decks
10%synergy
Court of Cunning
12%inclusion803 decks6.67K decks
11%synergy
Copy Artifact
11%inclusion755 decks6.67K decks
10%synergy
Sheltered by Ghosts
11%inclusion745 decks6.67K decks
9%synergy
One with the Multiverse
10%inclusion693 decks6.67K decks
6%synergy
Dazzling Theater // Prop Room
10%inclusion690 decks6.65K decks
9%synergy
Teval's Judgment
10%inclusion353 decks3.40K decks
10%synergy
Central Elevator // Promising Stairs
10%inclusion681 decks6.67K decks
10%synergy
Battles
Invasion of Theros
6.1%inclusion409 decks6.67K decks
4%synergy
Planeswalkers
Teferi, Time Raveler
19%inclusion1.27K decks6.67K decks
11%synergy
Utility Lands
Hall of Heliod's Generosity
48%inclusion3.21K decks6.67K decks
35%synergy
Otawara, Soaring City
34%inclusion2.25K decks6.67K decks
15%synergy
Bojuka Bog
31%inclusion2.10K decks6.67K decks
4%synergy
Urza's Saga
16%inclusion1.05K decks6.67K decks
4%synergy
Cephalid Coliseum
14%inclusion954 decks6.67K decks
11%synergy
Reliquary Tower
13%inclusion858 decks6.67K decks
-21%synergy
Takenuma, Abandoned Mire
13%inclusion843 decks6.67K decks
6%synergy
Halimar Depths
10%inclusion685 decks6.67K decks
5%synergy
Emergence Zone
10%inclusion655 decks6.67K decks
8%synergy
Urborg, Tomb of Yawgmoth
10%inclusion644 decks6.67K decks
-4%synergy
Minamo, School at Water's Edge
9.3%inclusion618 decks6.67K decks
5%synergy
Serra's Sanctum
9.2%inclusion617 decks6.67K decks
7%synergy
Mana Artifacts
Sol Ring
91%inclusion6.06K decks6.67K decks
1%synergy
Arcane Signet
91%inclusion6.04K decks6.67K decks
3%synergy
Talisman of Dominance
59%inclusion3.91K decks6.67K decks
10%synergy
Talisman of Progress
51%inclusion3.38K decks6.67K decks
8%synergy
Fellwar Stone
44%inclusion2.94K decks6.67K decks
10%synergy
Talisman of Hierarchy
44%inclusion2.93K decks6.67K decks
1%synergy
Azorius Signet
34%inclusion2.25K decks6.67K decks
1%synergy
Orzhov Signet
32%inclusion2.16K decks6.67K decks
-2%synergy
Lotus Petal
27%inclusion1.80K decks6.67K decks
16%synergy
Chrome Mox
24%inclusion1.62K decks6.67K decks
15%synergy
Dimir Signet
24%inclusion1.61K decks6.67K decks
-8%synergy
Mox Diamond
20%inclusion1.36K decks6.67K decks
13%synergy
Mox Opal
20%inclusion1.32K decks6.67K decks
11%synergy
Lion's Eye Diamond
15%inclusion1.03K decks6.67K decks
13%synergy
Mind Stone
15%inclusion1K decks6.67K decks
2%synergy
Commander's Sphere
12%inclusion814 decks6.67K decks
-7%synergy
Mox Amber
11%inclusion728 decks6.67K decks
5%synergy
Grim Monolith
9.0%inclusion598 decks6.67K decks
5%synergy
Thought Vessel
6.5%inclusion435 decks6.67K decks
-18%synergy
Chromatic Lantern
6.0%inclusion403 decks6.67K decks
-7%synergy
Lands
Command Tower
94%inclusion6.25K decks6.67K decks
1%synergy
Island
85%inclusion5.67K decks6.67K decks
-8%synergy
Swamp
82%inclusion5.50K decks6.67K decks
-9%synergy
Plains
81%inclusion5.38K decks6.67K decks
-11%synergy
Godless Shrine
58%inclusion3.87K decks6.67K decks
8%synergy
Watery Grave
58%inclusion3.86K decks6.67K decks
8%synergy
Hallowed Fountain
58%inclusion3.84K decks6.67K decks
8%synergy
Exotic Orchard
55%inclusion3.68K decks6.67K decks
-3%synergy
Flooded Strand
52%inclusion3.50K decks6.67K decks
15%synergy
Polluted Delta
52%inclusion3.47K decks6.67K decks
15%synergy
Marsh Flats
49%inclusion3.28K decks6.67K decks
13%synergy
Arcane Sanctum
46%inclusion3.07K decks6.67K decks
-9%synergy
Caves of Koilos
44%inclusion2.96K decks6.67K decks
9%synergy
Adarkar Wastes
43%inclusion2.89K decks6.67K decks
13%synergy
Underground River
42%inclusion2.77K decks6.67K decks
9%synergy
Morphic Pool
40%inclusion2.69K decks6.67K decks
6%synergy
Sea of Clouds
40%inclusion2.64K decks6.67K decks
4%synergy
Vault of Champions
37%inclusion2.44K decks6.67K decks
4%synergy
Undercity Sewers
35%inclusion2.30K decks6.67K decks
20%synergy
Raffine's Tower
34%inclusion2.25K decks6.67K decks
-7%synergy
Glacial Fortress
29%inclusion1.92K decks6.67K decks
-11%synergy
City of Brass
28%inclusion1.90K decks6.67K decks
13%synergy
Meticulous Archive
28%inclusion1.84K decks6.67K decks
14%synergy
Isolated Chapel
28%inclusion1.84K decks6.67K decks
-11%synergy
Scrubland
27%inclusion1.83K decks6.67K decks
12%synergy
Tundra
27%inclusion1.83K decks6.67K decks
11%synergy
Underground Sea
27%inclusion1.79K decks6.67K decks
11%synergy
Mana Confluence
27%inclusion1.78K decks6.67K decks
13%synergy
Bloodstained Mire
26%inclusion1.74K decks6.67K decks
15%synergy
Misty Rainforest
26%inclusion1.73K decks6.67K decks
15%synergy
Shadowy Backstreet
26%inclusion1.71K decks6.67K decks
13%synergy
Verdant Catacombs
24%inclusion1.61K decks6.67K decks
14%synergy
Drowned Catacomb
24%inclusion1.60K decks6.67K decks
-12%synergy
Scalding Tarn
23%inclusion1.56K decks6.67K decks
12%synergy
Prairie Stream
23%inclusion1.53K decks6.67K decks
-18%synergy
Windswept Heath
23%inclusion1.51K decks6.67K decks
13%synergy
Valgavoth's Lair
23%inclusion1.51K decks6.67K decks
20%synergy
Gemstone Caverns
22%inclusion1.49K decks6.67K decks
15%synergy
Evolving Wilds
22%inclusion1.49K decks6.67K decks
-3%synergy
Terramorphic Expanse
22%inclusion1.45K decks6.67K decks
5%synergy
Sunken Hollow
22%inclusion1.44K decks6.67K decks
-18%synergy
Temple of Enlightenment
21%inclusion1.42K decks6.67K decks
4%synergy
Temple of Silence
21%inclusion1.40K decks6.67K decks
1%synergy
Arid Mesa
20%inclusion1.36K decks6.67K decks
10%synergy
Temple of Deceit
20%inclusion1.35K decks6.67K decks
2%synergy
Obscura Storefront
20%inclusion1.32K decks6.67K decks
9%synergy
Tainted Field
19%inclusion1.24K decks6.67K decks
12%synergy
Azorius Chancery
18%inclusion1.22K decks6.67K decks
4%synergy
Tainted Isle
18%inclusion1.21K decks6.67K decks
12%synergy
Dimir Aqueduct
18%inclusion1.18K decks6.67K decks
4%synergy