The Master of Keys (Commander) - Budget Optimized Combo

The Master of Keys
Rank #306
3decks
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Background image for What if Thassa's Oracle Were Banned?
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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Commander Spellbook
Moxfield
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Sorceries
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Enchantments
Planeswalkers
Utility Lands
Mana Artifacts
Lands
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Enlightened Tutor
33%inclusion1 decks3 decks
14%synergy
Creatures
Entity Tracker
100%inclusion3 decks3 decks
94%synergy
Scrabbling Skullcrab
67%inclusion2 decks3 decks
66%synergy
Gravebreaker Lamia
67%inclusion2 decks3 decks
66%synergy
Overlord of the Floodpits
67%inclusion2 decks3 decks
63%synergy
Archon of Sun's Grace
67%inclusion2 decks3 decks
62%synergy
Inquisitive Glimmer
67%inclusion2 decks3 decks
59%synergy
Demon of Fate's Design
67%inclusion2 decks3 decks
61%synergy
Leonin Relic-Warder
67%inclusion2 decks3 decks
66%synergy
Mesa Enchantress
67%inclusion2 decks3 decks
58%synergy
Victor, Valgavoth's Seneschal
67%inclusion2 decks3 decks
65%synergy
Gremlin Tamer
67%inclusion2 decks3 decks
66%synergy
Laboratory Maniac
67%inclusion2 decks3 decks
63%synergy
Grim Guardian
67%inclusion2 decks3 decks
64%synergy
Ghostly Dancers
67%inclusion2 decks3 decks
64%synergy
Zur, Eternal Schemer
67%inclusion2 decks3 decks
63%synergy
Starnheim Courser
33%inclusion1 decks3 decks
29%synergy
Fear of Infinity
33%inclusion1 decks3 decks
33%synergy
Witch Enchanter
33%inclusion1 decks3 decks
26%synergy
Displacer Kitten
33%inclusion1 decks3 decks
26%synergy
Lotho, Corrupt Shirriff
33%inclusion1 decks3 decks
16%synergy
Protean Thaumaturge
33%inclusion1 decks3 decks
33%synergy
Hoarding Broodlord
33%inclusion1 decks3 decks
31%synergy
Starfield Mystic
33%inclusion1 decks3 decks
27%synergy
Phyrexian Metamorph
33%inclusion1 decks3 decks
25%synergy
Agent of Erebos
33%inclusion1 decks3 decks
33%synergy
Doom Whisperer
33%inclusion1 decks3 decks
32%synergy
Mirrorhall Mimic
33%inclusion1 decks3 decks
33%synergy
Heliod, God of the Sun
33%inclusion1 decks3 decks
32%synergy
Hydroelectric Specimen
33%inclusion1 decks3 decks
31%synergy
Fear of Impostors
33%inclusion1 decks3 decks
32%synergy
Sage of Mysteries
33%inclusion1 decks3 decks
33%synergy
Overlord of the Balemurk
33%inclusion1 decks3 decks
31%synergy
Soaring Lightbringer
33%inclusion1 decks3 decks
29%synergy
Silent Hallcreeper
33%inclusion1 decks3 decks
29%synergy
Ashiok's Reaper
33%inclusion1 decks3 decks
33%synergy
Hedron Crab
33%inclusion1 decks3 decks
33%synergy
Windborn Muse
33%inclusion1 decks3 decks
31%synergy
Overlord of the Mistmoors
33%inclusion1 decks3 decks
31%synergy
Shadow Kin
33%inclusion1 decks3 decks
33%synergy
Stitcher's Supplier
33%inclusion1 decks3 decks
33%synergy
Moon-Blessed Cleric
33%inclusion1 decks3 decks
29%synergy
Ajani's Chosen
33%inclusion1 decks3 decks
33%synergy
Enduring Curiosity
33%inclusion1 decks3 decks
25%synergy
Appendage Amalgam
33%inclusion1 decks3 decks
33%synergy
Fear of Sleep Paralysis
33%inclusion1 decks3 decks
28%synergy
Balemurk Leech
33%inclusion1 decks3 decks
33%synergy
Doomwake Giant
33%inclusion1 decks3 decks
27%synergy
Phantasmal Image
33%inclusion1 decks3 decks
31%synergy
Abdel Adrian, Gorion's Ward
33%inclusion1 decks3 decks
32%synergy
Mangara, the Diplomat
33%inclusion1 decks3 decks
32%synergy
Instants
Counterspell
100%inclusion3 decks3 decks
58%synergy
Dark Ritual
67%inclusion2 decks3 decks
47%synergy
Path to Exile
67%inclusion2 decks3 decks
24%synergy
Sacrifice
33%inclusion1 decks3 decks
33%synergy
An Offer You Can't Refuse
33%inclusion1 decks3 decks
6%synergy
Negate
33%inclusion1 decks3 decks
17%synergy
Songs of the Damned
33%inclusion1 decks3 decks
33%synergy
Razorgrass Ambush
33%inclusion1 decks3 decks
32%synergy
Culling the Weak
33%inclusion1 decks3 decks
32%synergy
Opt
33%inclusion1 decks3 decks
29%synergy
Jwari Disruption
33%inclusion1 decks3 decks
33%synergy
Wash Away
33%inclusion1 decks3 decks
32%synergy
Arcane Denial
33%inclusion1 decks3 decks
13%synergy
Swords to Plowshares
33%inclusion1 decks3 decks
-35%synergy
Get Out
33%inclusion1 decks3 decks
33%synergy
Sink into Stupor
33%inclusion1 decks3 decks
21%synergy
Mana Leak
33%inclusion1 decks3 decks
32%synergy
Waterlogged Teachings
33%inclusion1 decks3 decks
29%synergy
Sorceries
Windfall
33%inclusion1 decks3 decks
20%synergy
Dread Return
33%inclusion1 decks3 decks
31%synergy
Idyllic Tutor
33%inclusion1 decks3 decks
29%synergy
Feed the Swarm
33%inclusion1 decks3 decks
30%synergy
Toxic Deluge
33%inclusion1 decks3 decks
14%synergy
Damn
33%inclusion1 decks3 decks
13%synergy
Traumatize
33%inclusion1 decks3 decks
33%synergy
Utility Artifacts
Keys to the House
33%inclusion1 decks3 decks
33%synergy
Mirage Mirror
33%inclusion1 decks3 decks
32%synergy
Wishclaw Talisman
33%inclusion1 decks3 decks
25%synergy
Helm of Awakening
33%inclusion1 decks3 decks
33%synergy
Enchantments
Court of Cunning
67%inclusion2 decks3 decks
66%synergy
Ripples of Undeath
67%inclusion2 decks3 decks
64%synergy
Enchanted Evening
67%inclusion2 decks3 decks
65%synergy
Secret Arcade // Dusty Parlor
67%inclusion2 decks3 decks
62%synergy
Hallowed Haunting
67%inclusion2 decks3 decks
64%synergy
Dollmaker's Shop // Porcelain Gallery
67%inclusion2 decks3 decks
66%synergy
Stillness in Motion
50%inclusion1 decks2 decks
50%synergy
Endless Evil
33%inclusion1 decks3 decks
33%synergy
Parallax Wave
33%inclusion1 decks3 decks
33%synergy
Hesitation
33%inclusion1 decks3 decks
33%synergy
Cramped Vents // Access Maze
33%inclusion1 decks3 decks
31%synergy
Cacophony Unleashed
33%inclusion1 decks3 decks
32%synergy
Underwater Tunnel // Slimy Aquarium
33%inclusion1 decks3 decks
33%synergy
Extravagant Replication
33%inclusion1 decks3 decks
28%synergy
Sigil of the Empty Throne
33%inclusion1 decks3 decks
27%synergy
Tinybones Joins Up
33%inclusion1 decks3 decks
32%synergy
Out of the Tombs
33%inclusion1 decks3 decks
33%synergy
Font of Fortunes
33%inclusion1 decks3 decks
33%synergy
Touch the Spirit Realm
33%inclusion1 decks3 decks
31%synergy
Curse of the Bloody Tome
33%inclusion1 decks3 decks
33%synergy
Opalescence
33%inclusion1 decks3 decks
33%synergy
Surgical Suite // Hospital Room
33%inclusion1 decks3 decks
33%synergy
Thought Reflection
33%inclusion1 decks3 decks
33%synergy
Necromancy
33%inclusion1 decks3 decks
29%synergy
Followed Footsteps
33%inclusion1 decks3 decks
32%synergy
Meat Locker // Drowned Diner
33%inclusion1 decks3 decks
33%synergy
Mystic Remora
33%inclusion1 decks3 decks
12%synergy
Timely Ward
33%inclusion1 decks3 decks
28%synergy
Derelict Attic // Widow's Walk
33%inclusion1 decks3 decks
33%synergy
Starfield of Nyx
33%inclusion1 decks3 decks
29%synergy
Central Elevator // Promising Stairs
33%inclusion1 decks3 decks
33%synergy
Sphere of Safety
33%inclusion1 decks3 decks
24%synergy
March of the Canonized
33%inclusion1 decks3 decks
33%synergy
Funeral Room // Awakening Hall
33%inclusion1 decks3 decks
32%synergy
Amphibian Downpour
33%inclusion1 decks3 decks
29%synergy
All That Glitters
33%inclusion1 decks3 decks
25%synergy
Seal of Cleansing
33%inclusion1 decks3 decks
32%synergy
Koskun Falls
33%inclusion1 decks3 decks
33%synergy
Static Prison
33%inclusion1 decks3 decks
33%synergy
Restricted Office // Lecture Hall
33%inclusion1 decks3 decks
31%synergy
Bottomless Pool // Locker Room
33%inclusion1 decks3 decks
31%synergy
Unholy Annex // Ritual Chamber
33%inclusion1 decks3 decks
33%synergy
Animate Dead
33%inclusion1 decks3 decks
24%synergy
Dress Down
33%inclusion1 decks3 decks
31%synergy
Dazzling Theater // Prop Room
33%inclusion1 decks3 decks
32%synergy
Ever-Watching Threshold
33%inclusion1 decks3 decks
33%synergy
Chthonian Nightmare
33%inclusion1 decks3 decks
33%synergy
Polluted Cistern // Dim Oubliette
33%inclusion1 decks3 decks
33%synergy
Nowhere to Run
33%inclusion1 decks3 decks
32%synergy
Ethereal Armor
33%inclusion1 decks3 decks
29%synergy
Planeswalkers
Teferi, Time Raveler
33%inclusion1 decks3 decks
25%synergy
Utility Lands
Bojuka Bog
33%inclusion1 decks3 decks
6%synergy
Hall of Heliod's Generosity
33%inclusion1 decks3 decks
20%synergy
Emergence Zone
33%inclusion1 decks3 decks
31%synergy
Cephalid Coliseum
33%inclusion1 decks3 decks
30%synergy
Mana Artifacts
Sol Ring
100%inclusion3 decks3 decks
10%synergy
Arcane Signet
67%inclusion2 decks3 decks
-21%synergy
Talisman of Progress
33%inclusion1 decks3 decks
-10%synergy
Commander's Sphere
33%inclusion1 decks3 decks
15%synergy
Talisman of Dominance
33%inclusion1 decks3 decks
-16%synergy
Machine God's Effigy
33%inclusion1 decks3 decks
32%synergy
Dimir Signet
33%inclusion1 decks3 decks
2%synergy
Fellwar Stone
33%inclusion1 decks3 decks
0%synergy
Talisman of Hierarchy
33%inclusion1 decks3 decks
-11%synergy
Mind Stone
33%inclusion1 decks3 decks
21%synergy
Orzhov Signet
33%inclusion1 decks3 decks
0%synergy
Azorius Signet
33%inclusion1 decks3 decks
2%synergy
Lands
Swamp
100%inclusion3 decks3 decks
9%synergy
Island
100%inclusion3 decks3 decks
7%synergy
Plains
100%inclusion3 decks3 decks
8%synergy
Glacial Fortress
67%inclusion2 decks3 decks
25%synergy
Command Tower
67%inclusion2 decks3 decks
-26%synergy
Terramorphic Expanse
67%inclusion2 decks3 decks
50%synergy
Exotic Orchard
67%inclusion2 decks3 decks
8%synergy
Caves of Koilos
67%inclusion2 decks3 decks
31%synergy
Prairie Stream
67%inclusion2 decks3 decks
26%synergy
Arcane Sanctum
67%inclusion2 decks3 decks
12%synergy
Evolving Wilds
67%inclusion2 decks3 decks
42%synergy
Obscura Storefront
67%inclusion2 decks3 decks
57%synergy
Witch Enchanter
33%inclusion1 decks3 decks
26%synergy
Desolate Mire
33%inclusion1 decks3 decks
27%synergy
Port Town
33%inclusion1 decks3 decks
16%synergy
Darkwater Catacombs
33%inclusion1 decks3 decks
19%synergy
Hydroelectric Specimen
33%inclusion1 decks3 decks
31%synergy
Ash Barrens
33%inclusion1 decks3 decks
23%synergy
Razorgrass Ambush
33%inclusion1 decks3 decks
32%synergy
Valgavoth's Lair
33%inclusion1 decks3 decks
31%synergy
Godless Shrine
33%inclusion1 decks3 decks
-18%synergy
Skycloud Expanse
33%inclusion1 decks3 decks
18%synergy
Isolated Chapel
33%inclusion1 decks3 decks
-7%synergy
Drowned Catacomb
33%inclusion1 decks3 decks
-3%synergy
Underground River
33%inclusion1 decks3 decks
0%synergy
Jwari Disruption
33%inclusion1 decks3 decks
33%synergy
Sink into Stupor
33%inclusion1 decks3 decks
21%synergy
Shineshadow Snarl
33%inclusion1 decks3 decks
23%synergy
Sunken Hollow
33%inclusion1 decks3 decks
-6%synergy
Choked Estuary
33%inclusion1 decks3 decks
17%synergy
Adarkar Wastes
33%inclusion1 decks3 decks
2%synergy
Waterlogged Teachings
33%inclusion1 decks3 decks
29%synergy
Watery Grave
33%inclusion1 decks3 decks
-17%synergy
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