The Master of Keys (Commander) - Budget Optimized

The Master of Keys
Rank #300
30decks
As CommanderAs CardAverage DeckDecksView Precon
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Budget
Any$$$$
Harvey McGuinness
Sep 23, 2025
Harvey McGuinness
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.
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Enchantments
Battles
Utility Lands
Mana Artifacts
Lands
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Exhibition Tidecaller
17%inclusion1 decks6 decks
16%synergy
High Synergy Cards
Mesa Enchantress
80%inclusion24 decks30 decks
71%synergy
Secret Arcade // Dusty Parlor
73%inclusion22 decks30 decks
69%synergy
Inquisitive Glimmer
73%inclusion22 decks30 decks
66%synergy
Ondu Spiritdancer
70%inclusion21 decks30 decks
64%synergy
Starfield Mystic
70%inclusion21 decks30 decks
64%synergy
Demon of Fate's Design
67%inclusion20 decks30 decks
61%synergy
Mirrormade
70%inclusion21 decks30 decks
60%synergy
Scrabbling Skullcrab
60%inclusion18 decks30 decks
59%synergy
Gravebreaker Lamia
57%inclusion17 decks30 decks
56%synergy
Fear of Sleep Paralysis
60%inclusion18 decks30 decks
55%synergy
Top Cards
Swords to Plowshares
60%inclusion18 decks30 decks
-8%synergy
Sphere of Safety
57%inclusion17 decks30 decks
47%synergy
Entity Tracker
57%inclusion17 decks30 decks
51%synergy
Doomwake Giant
53%inclusion16 decks30 decks
48%synergy
Sigil of the Empty Throne
50%inclusion15 decks30 decks
44%synergy
Victor, Valgavoth's Seneschal
50%inclusion15 decks30 decks
48%synergy
Soaring Lightbringer
50%inclusion15 decks30 decks
45%synergy
Arcane Denial
50%inclusion15 decks30 decks
30%synergy
Bottomless Pool // Locker Room
50%inclusion15 decks30 decks
48%synergy
Fear of Impostors
47%inclusion14 decks30 decks
45%synergy
Game Changers
Gifts Ungiven
13%inclusion4 decks30 decks
11%synergy
Notion Thief
13%inclusion4 decks30 decks
7%synergy
Creatures
Moon-Blessed Cleric
47%inclusion14 decks30 decks
42%synergy
Ghostly Dancers
47%inclusion14 decks30 decks
44%synergy
Archetype of Imagination
43%inclusion13 decks30 decks
39%synergy
Overlord of the Floodpits
37%inclusion11 decks30 decks
33%synergy
Aminatou, Veil Piercer
37%inclusion11 decks30 decks
35%synergy
Skullsnap Nuisance
33%inclusion10 decks30 decks
33%synergy
Gremlin Tamer
33%inclusion10 decks30 decks
32%synergy
Solemn Simulacrum
30%inclusion9 decks30 decks
16%synergy
Grim Guardian
30%inclusion9 decks30 decks
28%synergy
Silent Hallcreeper
30%inclusion9 decks30 decks
25%synergy
Athreos, Shroud-Veiled
27%inclusion8 decks30 decks
22%synergy
Auramancer
27%inclusion8 decks30 decks
24%synergy
Zur the Enchanter
27%inclusion8 decks30 decks
22%synergy
Nightmare Shepherd
23%inclusion7 decks30 decks
21%synergy
Ancient Cellarspawn
23%inclusion7 decks30 decks
20%synergy
Heliod, the Radiant Dawn
23%inclusion7 decks30 decks
20%synergy
Zur, Eternal Schemer
23%inclusion7 decks30 decks
20%synergy
Archon of Sun's Grace
20%inclusion6 decks30 decks
16%synergy
Overlord of the Balemurk
20%inclusion6 decks30 decks
18%synergy
Abdel Adrian, Gorion's Ward
20%inclusion6 decks30 decks
18%synergy
Balemurk Leech
20%inclusion6 decks30 decks
19%synergy
Phenomenon Investigators
20%inclusion6 decks30 decks
19%synergy
Mindwrack Harpy
20%inclusion6 decks30 decks
20%synergy
Sage of Mysteries
17%inclusion5 decks30 decks
16%synergy
Burnished Hart
17%inclusion5 decks30 decks
14%synergy
Hedron Crab
17%inclusion5 decks30 decks
16%synergy
Enduring Curiosity
17%inclusion5 decks30 decks
9%synergy
Optimistic Scavenger
13%inclusion4 decks30 decks
13%synergy
Leonin Relic-Warder
13%inclusion4 decks30 decks
13%synergy
Malevolent Hermit
13%inclusion4 decks30 decks
13%synergy
Spirited Companion
13%inclusion4 decks30 decks
12%synergy
Nashi, Searcher in the Dark
13%inclusion4 decks30 decks
13%synergy
Underworld Coinsmith
13%inclusion4 decks30 decks
12%synergy
Ghostly Pilferer
13%inclusion4 decks30 decks
6%synergy
Creeping Peeper
13%inclusion4 decks30 decks
13%synergy
Metamorphosis Fanatic
10%inclusion3 decks30 decks
6%synergy
Fear of Infinity
10%inclusion3 decks30 decks
9%synergy
Fear of Isolation
10%inclusion3 decks30 decks
10%synergy
Lurrus of the Dream-Den
10%inclusion3 decks30 decks
9%synergy
Hydroelectric Specimen
10%inclusion3 decks30 decks
7%synergy
Overlord of the Mistmoors
10%inclusion3 decks30 decks
8%synergy
Laboratory Maniac
10%inclusion3 decks30 decks
7%synergy
Verge Rangers
10%inclusion3 decks30 decks
9%synergy
Braids, Arisen Nightmare
10%inclusion3 decks30 decks
9%synergy
Emet-Selch of the Third Seat
8.0%inclusion2 decks25 decks
-1%synergy
Starnheim Courser
6.7%inclusion2 decks30 decks
3%synergy
Spirit of the Labyrinth
6.7%inclusion2 decks30 decks
6%synergy
Protean Thaumaturge
6.7%inclusion2 decks30 decks
6%synergy
Wavebreak Hippocamp
6.7%inclusion2 decks30 decks
6%synergy
Fear of Surveillance
6.7%inclusion2 decks30 decks
6%synergy
Instants
Thirst for Meaning
37%inclusion11 decks30 decks
35%synergy
Inkshield
37%inclusion11 decks30 decks
27%synergy
Counterspell
33%inclusion10 decks30 decks
-8%synergy
Utter End
30%inclusion9 decks30 decks
24%synergy
Otherworldly Gaze
27%inclusion8 decks30 decks
24%synergy
Brainstorm
20%inclusion6 decks30 decks
3%synergy
Frantic Search
17%inclusion5 decks30 decks
-1%synergy
An Offer You Can't Refuse
17%inclusion5 decks30 decks
-11%synergy
Dovin's Veto
13%inclusion4 decks30 decks
-13%synergy
Dark Ritual
13%inclusion4 decks30 decks
-7%synergy
Path to Exile
13%inclusion4 decks30 decks
-29%synergy
Delay
13%inclusion4 decks30 decks
11%synergy
Get Out
13%inclusion4 decks30 decks
13%synergy
Muddle the Mixture
10%inclusion3 decks30 decks
6%synergy
Shred Memory
10%inclusion3 decks30 decks
10%synergy
Refute
10%inclusion3 decks30 decks
7%synergy
Telling Time
10%inclusion3 decks30 decks
8%synergy
Return to Dust
10%inclusion3 decks30 decks
7%synergy
Lim-Dûl's Vault
10%inclusion3 decks30 decks
7%synergy
Negate
10%inclusion3 decks30 decks
-6%synergy
Darkblast
10%inclusion3 decks30 decks
10%synergy
Fact or Fiction
10%inclusion3 decks30 decks
6%synergy
Mana Leak
10%inclusion3 decks30 decks
8%synergy
Opt
10%inclusion3 decks30 decks
6%synergy
No More Lies
10%inclusion3 decks30 decks
9%synergy
Soul Partition
6.7%inclusion2 decks30 decks
6%synergy
Dispel
6.7%inclusion2 decks30 decks
3%synergy
Spell Pierce
6.7%inclusion2 decks30 decks
4%synergy
Waterlogged Teachings
6.7%inclusion2 decks30 decks
2%synergy
Long River's Pull
6.7%inclusion2 decks30 decks
6%synergy
Sorceries
Redress Fate
43%inclusion13 decks30 decks
38%synergy
Sevinne's Reclamation
33%inclusion10 decks30 decks
24%synergy
Read the Bones
23%inclusion7 decks30 decks
19%synergy
Extinguish All Hope
23%inclusion7 decks30 decks
22%synergy
Lively Dirge
20%inclusion6 decks30 decks
19%synergy
Terminus
17%inclusion5 decks30 decks
13%synergy
Ponder
13%inclusion4 decks30 decks
4%synergy
Unmarked Grave
13%inclusion4 decks30 decks
12%synergy
Time Wipe
13%inclusion4 decks30 decks
7%synergy
Demonic Counsel
13%inclusion4 decks30 decks
12%synergy
Diabolic Vision
13%inclusion4 decks30 decks
11%synergy
Portent
13%inclusion4 decks30 decks
10%synergy
Entreat the Angels
13%inclusion4 decks30 decks
11%synergy
Aminatou's Augury
13%inclusion4 decks30 decks
12%synergy
Windfall
10%inclusion3 decks30 decks
-3%synergy
Resurgent Belief
10%inclusion3 decks30 decks
8%synergy
Damn
10%inclusion3 decks30 decks
-10%synergy
Buried Alive
10%inclusion3 decks30 decks
6%synergy
Supreme Verdict
6.7%inclusion2 decks30 decks
-8%synergy
Unearth
6.7%inclusion2 decks30 decks
5%synergy
Split Up
6.7%inclusion2 decks30 decks
6%synergy
Glimpse the Unthinkable
6.7%inclusion2 decks30 decks
6%synergy
Feed the Swarm
6.7%inclusion2 decks30 decks
4%synergy
Reanimate
6.7%inclusion2 decks30 decks
-10%synergy
Ringsight
6.7%inclusion2 decks30 decks
5%synergy
Traumatize
6.7%inclusion2 decks30 decks
6%synergy
Living Death
6.7%inclusion2 decks30 decks
2%synergy
Final Parting
6.7%inclusion2 decks30 decks
6%synergy
Insatiable Avarice
6.7%inclusion2 decks30 decks
5%synergy
Final Vengeance
6.7%inclusion2 decks30 decks
6%synergy
Dance of the Manse
6.7%inclusion2 decks30 decks
3%synergy
Utility Artifacts
Keys to the House
20%inclusion6 decks30 decks
20%synergy
Wishclaw Talisman
13%inclusion4 decks30 decks
6%synergy
Cloud Key
10%inclusion3 decks30 decks
7%synergy
Swiftfoot Boots
10%inclusion3 decks30 decks
-14%synergy
The Everflowing Well
6.7%inclusion2 decks30 decks
6%synergy
Wayfarer's Bauble
6.7%inclusion2 decks30 decks
-1%synergy
Enchantments
Timely Ward
47%inclusion14 decks30 decks
42%synergy
Extravagant Replication
43%inclusion13 decks30 decks
38%synergy
Dress Down
43%inclusion13 decks30 decks
41%synergy
Ripples of Undeath
40%inclusion12 decks30 decks
37%synergy
Monologue Tax
40%inclusion12 decks30 decks
34%synergy
Shark Typhoon
37%inclusion11 decks30 decks
31%synergy
Animate Dead
37%inclusion11 decks30 decks
27%synergy
Seal of Cleansing
37%inclusion11 decks30 decks
35%synergy
Ethereal Armor
33%inclusion10 decks30 decks
29%synergy
Cast Out
30%inclusion9 decks30 decks
27%synergy
One with the Multiverse
27%inclusion8 decks30 decks
22%synergy
Cramped Vents // Access Maze
27%inclusion8 decks30 decks
24%synergy
The Eldest Reborn
27%inclusion8 decks30 decks
24%synergy
Central Elevator // Promising Stairs
27%inclusion8 decks30 decks
26%synergy
Cemetery Tampering
27%inclusion8 decks30 decks
26%synergy
Polluted Cistern // Dim Oubliette
27%inclusion8 decks30 decks
26%synergy
Seal of Removal
27%inclusion8 decks30 decks
26%synergy
Defiled Crypt // Cadaver Lab
27%inclusion8 decks30 decks
26%synergy
Amphibian Downpour
27%inclusion8 decks30 decks
22%synergy
Restricted Office // Lecture Hall
27%inclusion8 decks30 decks
25%synergy
Meat Locker // Drowned Diner
23%inclusion7 decks30 decks
23%synergy
Mirror Room // Fractured Realm
23%inclusion7 decks30 decks
21%synergy
Grasp of Fate
20%inclusion6 decks30 decks
14%synergy
Cacophony Unleashed
20%inclusion6 decks30 decks
18%synergy
Unable to Scream
20%inclusion6 decks30 decks
19%synergy
Witness Protection
20%inclusion6 decks30 decks
18%synergy
Secrets of the Dead
20%inclusion6 decks30 decks
20%synergy
Stillness in Motion
19%inclusion5 decks26 decks
19%synergy
Founding the Third Path
17%inclusion5 decks30 decks
16%synergy
Touch the Spirit Realm
17%inclusion5 decks30 decks
14%synergy
Estrid's Invocation
17%inclusion5 decks30 decks
12%synergy
All That Glitters
17%inclusion5 decks30 decks
8%synergy
Blind Obedience
17%inclusion5 decks30 decks
5%synergy
Surgical Suite // Hospital Room
17%inclusion5 decks30 decks
16%synergy
Necromancy
17%inclusion5 decks30 decks
12%synergy
Nowhere to Run
17%inclusion5 decks30 decks
15%synergy
Copy Enchantment
17%inclusion5 decks30 decks
12%synergy
Dazzling Theater // Prop Room
17%inclusion5 decks30 decks
15%synergy
Sheltered by Ghosts
17%inclusion5 decks30 decks
14%synergy
Hallowed Haunting
17%inclusion5 decks30 decks
14%synergy
Phyrexian Arena
17%inclusion5 decks30 decks
3%synergy
Darksteel Mutation
13%inclusion4 decks30 decks
7%synergy
Trapped in the Screen
13%inclusion4 decks30 decks
13%synergy
Tinybones Joins Up
13%inclusion4 decks30 decks
12%synergy
Spirit-Sister's Call
13%inclusion4 decks30 decks
12%synergy
Mystic Remora
13%inclusion4 decks30 decks
-7%synergy
Derelict Attic // Widow's Walk
13%inclusion4 decks30 decks
13%synergy
The Tale of Tamiyo
13%inclusion4 decks30 decks
13%synergy
Static Prison
13%inclusion4 decks30 decks
13%synergy
Aura of Silence
13%inclusion4 decks30 decks
10%synergy
Battles
Invasion of Theros
6.7%inclusion2 decks30 decks
5%synergy
Utility Lands
Hall of Heliod's Generosity
60%inclusion18 decks30 decks
47%synergy
Bojuka Bog
47%inclusion14 decks30 decks
20%synergy
Halimar Depths
37%inclusion11 decks30 decks
32%synergy
Cephalid Coliseum
13%inclusion4 decks30 decks
10%synergy
Rogue's Passage
10%inclusion3 decks30 decks
0%synergy
Nephalia Drownyard
6.7%inclusion2 decks30 decks
6%synergy
Reliquary Tower
6.7%inclusion2 decks30 decks
-27%synergy
Mana Artifacts
Arcane Signet
90%inclusion27 decks30 decks
2%synergy
Sol Ring
90%inclusion27 decks30 decks
0%synergy
Orzhov Signet
57%inclusion17 decks30 decks
24%synergy
Azorius Signet
57%inclusion17 decks30 decks
26%synergy
Mind Stone
37%inclusion11 decks30 decks
25%synergy
Commander's Sphere
30%inclusion9 decks30 decks
12%synergy
Fellwar Stone
27%inclusion8 decks30 decks
-7%synergy
Talisman of Hierarchy
27%inclusion8 decks30 decks
-18%synergy
Talisman of Progress
23%inclusion7 decks30 decks
-21%synergy
Talisman of Dominance
23%inclusion7 decks30 decks
-26%synergy
Dimir Signet
20%inclusion6 decks30 decks
-11%synergy
Lands
Swamp
100%inclusion30 decks30 decks
8%synergy
Island
100%inclusion30 decks30 decks
7%synergy
Plains
100%inclusion30 decks30 decks
8%synergy
Command Tower
90%inclusion27 decks30 decks
-3%synergy
Caves of Koilos
80%inclusion24 decks30 decks
44%synergy
Underground River
73%inclusion22 decks30 decks
39%synergy
Arcane Sanctum
70%inclusion21 decks30 decks
16%synergy
Adarkar Wastes
70%inclusion21 decks30 decks
38%synergy
Terramorphic Expanse
63%inclusion19 decks30 decks
47%synergy
Evolving Wilds
60%inclusion18 decks30 decks
35%synergy
Obscura Storefront
60%inclusion18 decks30 decks
50%synergy
Temple of Silence
60%inclusion18 decks30 decks
41%synergy
Orzhov Basilica
60%inclusion18 decks30 decks
45%synergy
Azorius Chancery
57%inclusion17 decks30 decks
43%synergy
Tainted Isle
53%inclusion16 decks30 decks
47%synergy
Temple of Deceit
53%inclusion16 decks30 decks
36%synergy
Dimir Aqueduct
53%inclusion16 decks30 decks
40%synergy
Tainted Field
53%inclusion16 decks30 decks
46%synergy
Temple of Enlightenment
50%inclusion15 decks30 decks
34%synergy
Ash Barrens
43%inclusion13 decks30 decks
33%synergy
Glacial Fortress
33%inclusion10 decks30 decks
-9%synergy
Exotic Orchard
33%inclusion10 decks30 decks
-25%synergy
Isolated Chapel
30%inclusion9 decks30 decks
-11%synergy
Thriving Heath
30%inclusion9 decks30 decks
26%synergy
Thriving Isle
27%inclusion8 decks30 decks
22%synergy
Thriving Moor
27%inclusion8 decks30 decks
22%synergy
Sunken Hollow
27%inclusion8 decks30 decks
-13%synergy
Prairie Stream
23%inclusion7 decks30 decks
-17%synergy
Contaminated Landscape
20%inclusion6 decks30 decks
6%synergy
Skycloud Expanse
20%inclusion6 decks30 decks
5%synergy
Darkwater Catacombs
17%inclusion5 decks30 decks
2%synergy
River of Tears
17%inclusion5 decks30 decks
15%synergy
Drowned Catacomb
17%inclusion5 decks30 decks
-21%synergy
Valgavoth's Lair
13%inclusion4 decks30 decks
11%synergy
Dismal Backwater
13%inclusion4 decks30 decks
7%synergy
Abandoned Campground
10%inclusion3 decks30 decks
9%synergy
Hydroelectric Specimen
10%inclusion3 decks30 decks
7%synergy
Raffine's Tower
10%inclusion3 decks30 decks
-31%synergy
Choked Estuary
10%inclusion3 decks30 decks
-6%synergy
Floodfarm Verge
10%inclusion3 decks30 decks
-1%synergy
Undercity Sewers
6.7%inclusion2 decks30 decks
-8%synergy
Myriad Landscape
6.7%inclusion2 decks30 decks
-1%synergy
Spire of Industry
6.7%inclusion2 decks30 decks
-1%synergy
Tranquil Cove
6.7%inclusion2 decks30 decks
1%synergy
Fetid Heath
6.7%inclusion2 decks30 decks
-6%synergy
Promising Vein
6.7%inclusion2 decks30 decks
6%synergy
Dimir Guildgate
6.7%inclusion2 decks30 decks
5%synergy
Seachrome Coast
6.7%inclusion2 decks30 decks
3%synergy
Shineshadow Snarl
6.7%inclusion2 decks30 decks
-4%synergy
Waterlogged Teachings
6.7%inclusion2 decks30 decks
2%synergy
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