Shepherd of the Cosmos
Altar of Dementia
Necrogen Communion

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
Necrogen Communion attached to Shepherd of the Cosmos.

   Steps

How does this combo work?
1
Activate Altar of Dementia by sacrificing Shepherd of the Cosmos.
2
When Shepherd of the Cosmos dies, Necrogen Communion triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
3
When Shepherd of the Cosmos enters the battlefield, it triggers, returning Necrogen Communion from your graveyard to the battlefield attached to Shepherd of the Cosmos.
4
Resolve the Altar of Dementia ability, causing target player to mill cards equal to Shepherd of the Cosmos' power.
5
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite sacrifice triggers
Infinite death triggers
Infinite mill
Infinite self-mill
Lurrus of the Dream-Den
0.2%inclusion5 decks2.77K decks
Syr Vondam, Sunstar Exemplar
0.0%inclusion1 decks3.96K decks
Victor, Valgavoth's Seneschal
0.0%inclusion1 decks2.40K decks
Ardenn, Intrepid Archaeologist // Ikra Shidiqi, the Usurper
1.2%inclusion1 decks81 decks
Elas il-Kor, Sadistic Pilgrim
0.0%inclusion1 decks7.96K decks
High Synergy Cards
Kaya's Ghostform
100%inclusion9 decks9 decks
96%synergy
Viscera Seer
89%inclusion8 decks9 decks
81%synergy
Sun Titan
89%inclusion8 decks9 decks
81%synergy
Animate Dead
89%inclusion8 decks9 decks
80%synergy
Angelic Renewal
78%inclusion7 decks9 decks
77%synergy
Zulaport Cutthroat
78%inclusion7 decks9 decks
69%synergy
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67%inclusion6 decks9 decks
66%synergy
Seal of Cleansing
67%inclusion6 decks9 decks
66%synergy
Dance of the Dead
67%inclusion6 decks9 decks
65%synergy
Blood Artist
67%inclusion6 decks9 decks
55%synergy
Top Cards
Umbral Collar Zealot
57%inclusion4 decks7 decks
54%synergy
Angel of Indemnity
56%inclusion5 decks9 decks
55%synergy
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56%inclusion5 decks9 decks
49%synergy
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56%inclusion5 decks9 decks
44%synergy
Swords to Plowshares
56%inclusion5 decks9 decks
-5%synergy
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44%inclusion4 decks9 decks
43%synergy
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44%inclusion4 decks9 decks
43%synergy
Mesmeric Orb
44%inclusion4 decks9 decks
43%synergy
Phyrexian Altar
44%inclusion4 decks9 decks
41%synergy
Stitcher's Supplier
44%inclusion4 decks9 decks
40%synergy
Game Changers
Bolas's Citadel
22%inclusion2 decks9 decks
14%synergy
Enlightened Tutor
22%inclusion2 decks9 decks
7%synergy
Demonic Tutor
22%inclusion2 decks9 decks
3%synergy
Serra's Sanctum
11%inclusion1 decks9 decks
10%synergy
Teferi's Protection
11%inclusion1 decks9 decks
-5%synergy
Smothering Tithe
11%inclusion1 decks9 decks
-10%synergy
Creatures
Renegade Rallier
100%inclusion1 decks1 decks
100%synergy
Argothian Enchantress
100%inclusion1 decks1 decks
99%synergy
Verduran Enchantress
100%inclusion1 decks1 decks
98%synergy
Setessan Champion
100%inclusion1 decks1 decks
97%synergy
Destiny Spinner
100%inclusion1 decks1 decks
96%synergy
Satyr Enchanter
100%inclusion1 decks1 decks
96%synergy
Sanctum Weaver
100%inclusion1 decks1 decks
95%synergy
Sythis, Harvest's Hand
100%inclusion1 decks1 decks
93%synergy
Birds of Paradise
100%inclusion1 decks1 decks
72%synergy
Accursed Marauder
44%inclusion4 decks9 decks
39%synergy
Cruel Celebrant
44%inclusion4 decks9 decks
37%synergy
Pitiless Plunderer
44%inclusion4 decks9 decks
36%synergy
Elas il-Kor, Sadistic Pilgrim
44%inclusion4 decks9 decks
35%synergy
Boonweaver Giant
33%inclusion3 decks9 decks
33%synergy
Triarch Praetorian
33%inclusion3 decks9 decks
33%synergy
Brotherhood Outcast
33%inclusion3 decks9 decks
33%synergy
Undead Butler
33%inclusion3 decks9 decks
33%synergy
Dark Confidant
33%inclusion3 decks9 decks
31%synergy
Grim Haruspex
33%inclusion3 decks9 decks
31%synergy
Karmic Guide
33%inclusion3 decks9 decks
30%synergy
Bartolomé del Presidio
33%inclusion3 decks9 decks
29%synergy
Carrion Feeder
33%inclusion3 decks9 decks
29%synergy
Dauthi Voidwalker
33%inclusion3 decks9 decks
27%synergy
Syr Konrad, the Grim
33%inclusion3 decks9 decks
25%synergy
Lotho, Corrupt Shirriff
33%inclusion3 decks9 decks
20%synergy
Cynical Loner
25%inclusion2 decks8 decks
25%synergy
Curious Farm Animals
25%inclusion1 decks4 decks
24%synergy
Archon of Falling Stars
22%inclusion2 decks9 decks
22%synergy
Benalish Sleeper
22%inclusion2 decks9 decks
22%synergy
Westfold Rider
22%inclusion2 decks9 decks
22%synergy
Leonin Relic-Warder
22%inclusion2 decks9 decks
22%synergy
Golgari Thug
22%inclusion2 decks9 decks
21%synergy
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22%inclusion2 decks9 decks
21%synergy
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22%inclusion2 decks9 decks
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Reveillark
22%inclusion2 decks9 decks
21%synergy
Millikin
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Vengeful Bloodwitch
22%inclusion2 decks9 decks
20%synergy
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22%inclusion2 decks9 decks
20%synergy
Giver of Runes
22%inclusion2 decks9 decks
20%synergy
Cathar Commando
22%inclusion2 decks9 decks
20%synergy
Priest of Fell Rites
22%inclusion2 decks9 decks
20%synergy
Luminous Broodmoth
22%inclusion2 decks9 decks
19%synergy
Yahenni, Undying Partisan
22%inclusion2 decks9 decks
19%synergy
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22%inclusion2 decks9 decks
19%synergy
Spirited Companion
22%inclusion2 decks9 decks
19%synergy
Gravecrawler
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18%synergy
Boggart Trawler
22%inclusion2 decks9 decks
18%synergy
Marionette Apprentice
22%inclusion2 decks9 decks
18%synergy
Knight of the White Orchid
22%inclusion2 decks9 decks
18%synergy
Instants
Rite of Harmony
100%inclusion1 decks1 decks
98%synergy
Nature's Claim
100%inclusion1 decks1 decks
93%synergy
Beast Within
100%inclusion1 decks1 decks
67%synergy
Entomb
44%inclusion4 decks9 decks
38%synergy
Path to Exile
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-3%synergy
Malakir Rebirth
33%inclusion3 decks9 decks
25%synergy
Anguished Unmaking
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9%synergy
Darkblast
22%inclusion2 decks9 decks
22%synergy
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22%inclusion2 decks9 decks
19%synergy
Flare of Fortitude
22%inclusion2 decks9 decks
18%synergy
Fell the Profane
22%inclusion2 decks9 decks
13%synergy
Despark
22%inclusion2 decks9 decks
9%synergy
Malicious Affliction
11%inclusion1 decks9 decks
11%synergy
Holy Day
11%inclusion1 decks9 decks
11%synergy
Fanatical Offering
11%inclusion1 decks9 decks
10%synergy
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11%inclusion1 decks9 decks
10%synergy
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11%inclusion1 decks9 decks
10%synergy
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11%inclusion1 decks9 decks
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11%inclusion1 decks9 decks
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9%synergy
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9%synergy
Razorgrass Ambush
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9%synergy
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11%inclusion1 decks9 decks
9%synergy
Fake Your Own Death
11%inclusion1 decks9 decks
9%synergy
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11%inclusion1 decks9 decks
9%synergy
Return to Dust
11%inclusion1 decks9 decks
9%synergy
Bitter Triumph
11%inclusion1 decks9 decks
8%synergy
Disenchant
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Fracture
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6%synergy
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4%synergy
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-10%synergy
Dark Ritual
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-14%synergy
Sorceries
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100%inclusion1 decks1 decks
76%synergy
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69%synergy
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44%inclusion4 decks9 decks
38%synergy
Lively Dirge
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32%synergy
Dread Return
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28%synergy
Sevinne's Reclamation
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26%synergy
Victimize
33%inclusion3 decks9 decks
21%synergy
Insatiable Avarice
22%inclusion2 decks9 decks
19%synergy
Open the Armory
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18%synergy
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22%inclusion2 decks9 decks
13%synergy
Damn
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7%synergy
Toxic Deluge
22%inclusion2 decks9 decks
4%synergy
Gix's Command
11%inclusion1 decks9 decks
11%synergy
Beseech the Queen
11%inclusion1 decks9 decks
10%synergy
Tragic Arrogance
11%inclusion1 decks9 decks
10%synergy
Ascend from Avernus
11%inclusion1 decks9 decks
10%synergy
Split Up
11%inclusion1 decks9 decks
9%synergy
Unmarked Grave
11%inclusion1 decks9 decks
9%synergy
Winds of Rath
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9%synergy
Merciless Eviction
11%inclusion1 decks9 decks
9%synergy
Unearth
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8%synergy
Living Death
11%inclusion1 decks9 decks
6%synergy
Read the Bones
11%inclusion1 decks9 decks
5%synergy
Diabolic Intent
11%inclusion1 decks9 decks
3%synergy
Sign in Blood
11%inclusion1 decks9 decks
2%synergy
Reanimate
11%inclusion1 decks9 decks
-8%synergy
Utility Artifacts
Lightning Greaves
33%inclusion3 decks9 decks
9%synergy
Shriekhorn
22%inclusion2 decks9 decks
22%synergy
Throne of the Grim Captain
22%inclusion2 decks9 decks
22%synergy
Conjurer's Bauble
22%inclusion2 decks9 decks
22%synergy
Urza's Bauble
22%inclusion2 decks9 decks
22%synergy
Perpetual Timepiece
22%inclusion2 decks9 decks
21%synergy
Expedition Map
22%inclusion2 decks9 decks
19%synergy
Wishclaw Talisman
22%inclusion2 decks9 decks
17%synergy
Wayfarer's Bauble
22%inclusion2 decks9 decks
15%synergy
Lodestone Bauble
11%inclusion1 decks9 decks
11%synergy
Wand of Vertebrae
11%inclusion1 decks9 decks
11%synergy
Executioner's Capsule
11%inclusion1 decks9 decks
11%synergy
Blasting Station
11%inclusion1 decks9 decks
11%synergy
Nim Deathmantle
11%inclusion1 decks9 decks
11%synergy
Tome of Legends
11%inclusion1 decks9 decks
10%synergy
Codex Shredder
11%inclusion1 decks9 decks
10%synergy
Hero's Blade
11%inclusion1 decks9 decks
10%synergy
Smuggler's Copter
11%inclusion1 decks9 decks
10%synergy
Tormod's Crypt
11%inclusion1 decks9 decks
10%synergy
Tarrian's Journal
11%inclusion1 decks9 decks
10%synergy
Elixir of Immortality
11%inclusion1 decks9 decks
10%synergy
Mindcrank
11%inclusion1 decks9 decks
10%synergy
Whispersilk Cloak
11%inclusion1 decks9 decks
8%synergy
Sensei's Divining Top
11%inclusion1 decks9 decks
7%synergy
Enchantments
Whip Silk
100%inclusion1 decks1 decks
100%synergy
Wolfwillow Haven
100%inclusion1 decks1 decks
99%synergy
Overgrowth
100%inclusion1 decks1 decks
99%synergy
Fertile Ground
100%inclusion1 decks1 decks
97%synergy
Enchantress's Presence
100%inclusion1 decks1 decks
96%synergy
Rancor
100%inclusion1 decks1 decks
96%synergy
Sterling Grove
100%inclusion1 decks1 decks
94%synergy
Utopia Sprawl
100%inclusion1 decks1 decks
93%synergy
Wild Growth
100%inclusion1 decks1 decks
90%synergy
Ripples of Undeath
44%inclusion4 decks9 decks
40%synergy
Darksteel Mutation
44%inclusion4 decks9 decks
39%synergy
Bastion of Remembrance
44%inclusion4 decks9 decks
38%synergy
Minion's Return
33%inclusion3 decks9 decks
33%synergy
Necromancy
33%inclusion3 decks9 decks
30%synergy
The Meathook Massacre
33%inclusion3 decks9 decks
28%synergy
Shade's Form
22%inclusion2 decks9 decks
22%synergy
Unhallowed Pact
22%inclusion2 decks9 decks
22%synergy
Unholy Indenture
22%inclusion2 decks9 decks
22%synergy
Case of the Stashed Skeleton
22%inclusion2 decks9 decks
22%synergy
Soul Snare
22%inclusion2 decks9 decks
22%synergy
Chthonian Nightmare
22%inclusion2 decks9 decks
21%synergy
Gift of Immortality
22%inclusion2 decks9 decks
21%synergy
Land Tax
22%inclusion2 decks9 decks
16%synergy
Momentum Breaker
14%inclusion1 decks7 decks
14%synergy
Smile at Death
14%inclusion1 decks7 decks
13%synergy
Corrupted Zendikon
11%inclusion1 decks9 decks
11%synergy
Mire's Grasp
11%inclusion1 decks9 decks
11%synergy
Heliod's Punishment
11%inclusion1 decks9 decks
11%synergy
Conviction
11%inclusion1 decks9 decks
11%synergy
Omen of the Dead
11%inclusion1 decks9 decks
11%synergy
Dark Privilege
11%inclusion1 decks9 decks
11%synergy
Seal of Doom
11%inclusion1 decks9 decks
11%synergy
Scion of Halaster
11%inclusion1 decks9 decks
11%synergy
Journey to Nowhere
11%inclusion1 decks9 decks
11%synergy
Hopeless Nightmare
11%inclusion1 decks9 decks
11%synergy
Fanatical Devotion
11%inclusion1 decks9 decks
11%synergy
Case of the Uneaten Feast
11%inclusion1 decks9 decks
11%synergy
Tinybones Joins Up
11%inclusion1 decks9 decks
10%synergy
Scavenger's Talent
11%inclusion1 decks9 decks
10%synergy
Dawn of a New Age
11%inclusion1 decks9 decks
10%synergy
Court of Ardenvale
11%inclusion1 decks9 decks
10%synergy
Nowhere to Run
11%inclusion1 decks9 decks
10%synergy
Agent of the Iron Throne
11%inclusion1 decks9 decks
10%synergy
Funeral Room // Awakening Hall
11%inclusion1 decks9 decks
9%synergy
Sage's Reverie
11%inclusion1 decks9 decks
9%synergy
Touch the Spirit Realm
11%inclusion1 decks9 decks
9%synergy
Tortured Existence
11%inclusion1 decks9 decks
9%synergy
Waste Not
11%inclusion1 decks9 decks
9%synergy
Glasswing Grace
11%inclusion1 decks9 decks
9%synergy
Painful Quandary
11%inclusion1 decks9 decks
9%synergy
Utility Lands
Boseiju, Who Endures
100%inclusion1 decks1 decks
81%synergy
Takenuma, Abandoned Mire
44%inclusion4 decks9 decks
36%synergy
Bojuka Bog
44%inclusion4 decks9 decks
15%synergy
Castle Locthwain
33%inclusion3 decks9 decks
30%synergy
Hall of Heliod's Generosity
33%inclusion3 decks9 decks
27%synergy
High Market
22%inclusion2 decks9 decks
20%synergy
Geier Reach Sanitarium
22%inclusion2 decks9 decks
19%synergy
Mortuary Mire
22%inclusion2 decks9 decks
18%synergy
Phyrexian Tower
22%inclusion2 decks9 decks
13%synergy
Vault of the Archangel
22%inclusion2 decks9 decks
10%synergy
Eden, Seat of the Sanctum
14%inclusion1 decks7 decks
14%synergy
Dalkovan Encampment
14%inclusion1 decks7 decks
13%synergy
Susur Secundi, Void Altar
14%inclusion1 decks7 decks
12%synergy
Midgar, City of Mako
14%inclusion1 decks7 decks
11%synergy
Sejiri Steppe
11%inclusion1 decks9 decks
11%synergy
Endless Sands
11%inclusion1 decks9 decks
11%synergy
Roadside Reliquary
11%inclusion1 decks9 decks
11%synergy
Ifnir Deadlands
11%inclusion1 decks9 decks
10%synergy
Tomb Fortress
11%inclusion1 decks9 decks
10%synergy
Shefet Dunes
11%inclusion1 decks9 decks
10%synergy
Mistveil Plains
11%inclusion1 decks9 decks
10%synergy
Ghost Quarter
11%inclusion1 decks9 decks
9%synergy
Monumental Henge
11%inclusion1 decks9 decks
9%synergy
Dakmor Salvage
11%inclusion1 decks9 decks
9%synergy
Emergence Zone
11%inclusion1 decks9 decks
9%synergy
Spymaster's Vault
11%inclusion1 decks9 decks
8%synergy
Emeria, the Sky Ruin
11%inclusion1 decks9 decks
8%synergy
Scavenger Grounds
11%inclusion1 decks9 decks
8%synergy
Vault of Whispers
11%inclusion1 decks9 decks
7%synergy
Shizo, Death's Storehouse
11%inclusion1 decks9 decks
7%synergy
Buried Ruin
11%inclusion1 decks9 decks
6%synergy
Ancient Den
11%inclusion1 decks9 decks
6%synergy
War Room
11%inclusion1 decks9 decks
5%synergy
Eiganjo, Seat of the Empire
11%inclusion1 decks9 decks
4%synergy
Urborg, Tomb of Yawgmoth
11%inclusion1 decks9 decks
2%synergy
Cabal Coffers
11%inclusion1 decks9 decks
2%synergy
Reliquary Tower
11%inclusion1 decks9 decks
-19%synergy
Mana Artifacts
Sol Ring
89%inclusion8 decks9 decks
5%synergy
Arcane Signet
78%inclusion7 decks9 decks
6%synergy
Talisman of Hierarchy
56%inclusion5 decks9 decks
29%synergy
Orzhov Signet
33%inclusion3 decks9 decks
11%synergy
Lotus Petal
22%inclusion2 decks9 decks
15%synergy
Mind Stone
22%inclusion2 decks9 decks
8%synergy
Chromatic Sphere
11%inclusion1 decks9 decks
11%synergy
Chromatic Star
11%inclusion1 decks9 decks
11%synergy
Paradise Mantle
11%inclusion1 decks9 decks
10%synergy
Springleaf Drum
11%inclusion1 decks9 decks
9%synergy
Basalt Monolith
11%inclusion1 decks9 decks
9%synergy
Liquimetal Torque
11%inclusion1 decks9 decks
8%synergy
Everflowing Chalice
11%inclusion1 decks9 decks
7%synergy
Mox Amber
11%inclusion1 decks9 decks
7%synergy
Fellwar Stone
11%inclusion1 decks9 decks
-9%synergy
Lands
Bountiful Promenade
100%inclusion1 decks1 decks
78%synergy
Undergrowth Stadium
100%inclusion1 decks1 decks
76%synergy
Indatha Triome
100%inclusion1 decks1 decks
73%synergy
Temple Garden
100%inclusion1 decks1 decks
61%synergy
Overgrown Tomb
100%inclusion1 decks1 decks
59%synergy
Command Tower
89%inclusion8 decks9 decks
15%synergy
Vault of Champions
78%inclusion7 decks9 decks
54%synergy
Isolated Chapel
78%inclusion7 decks9 decks
44%synergy
Brightclimb Pathway
67%inclusion6 decks9 decks
59%synergy
Caves of Koilos
67%inclusion6 decks9 decks
37%synergy
Godless Shrine
67%inclusion6 decks9 decks
25%synergy
Shattered Sanctum
56%inclusion5 decks9 decks
40%synergy
Silent Clearing
44%inclusion4 decks9 decks
40%synergy
Tainted Field
44%inclusion4 decks9 decks
32%synergy
Fetid Heath
44%inclusion4 decks9 decks
31%synergy
Orzhov Basilica
44%inclusion4 decks9 decks
30%synergy
Bleachbone Verge
43%inclusion3 decks7 decks
34%synergy
Concealed Courtyard
33%inclusion3 decks9 decks
27%synergy
Shadowy Backstreet
33%inclusion3 decks9 decks
23%synergy
Marsh Flats
33%inclusion3 decks9 decks
23%synergy
Exotic Orchard
33%inclusion3 decks9 decks
-3%synergy
Lazotep Quarry
22%inclusion2 decks9 decks
21%synergy
Sunlit Marsh
22%inclusion2 decks9 decks
18%synergy
Desolate Mire
22%inclusion2 decks9 decks
16%synergy
Verdant Catacombs
22%inclusion2 decks9 decks
11%synergy
Windswept Heath
22%inclusion2 decks9 decks
11%synergy
Shineshadow Snarl
22%inclusion2 decks9 decks
10%synergy
Myriad Landscape
22%inclusion2 decks9 decks
7%synergy
Temple of Silence
22%inclusion2 decks9 decks
5%synergy
Survivors' Encampment
11%inclusion1 decks9 decks
10%synergy
Conduit Pylons
11%inclusion1 decks9 decks
10%synergy
Valgavoth's Lair
11%inclusion1 decks9 decks
10%synergy
Forlorn Flats
11%inclusion1 decks9 decks
10%synergy
The Mycosynth Gardens
11%inclusion1 decks9 decks
9%synergy
Snowfield Sinkhole
11%inclusion1 decks9 decks
9%synergy
Opal Palace
11%inclusion1 decks9 decks
9%synergy
Plaza of Heroes
11%inclusion1 decks9 decks
9%synergy
Urza's Cave
11%inclusion1 decks9 decks
8%synergy
Goldmire Bridge
11%inclusion1 decks9 decks
8%synergy
Mana Confluence
11%inclusion1 decks9 decks
4%synergy
City of Brass
11%inclusion1 decks9 decks
4%synergy
Fabled Passage
11%inclusion1 decks9 decks
1%synergy
Bloodstained Mire
11%inclusion1 decks9 decks
0%synergy
Polluted Delta
11%inclusion1 decks9 decks
-1%synergy
Scrubland
11%inclusion1 decks9 decks
-2%synergy
Path of Ancestry
11%inclusion1 decks9 decks
-11%synergy