Eirdu, Carrier of Dawn
Mikaeus, the Unhallowed
Altar of Dementia

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield (Eirdu as Isilu, Carrier of Twilight on the battlefield).
You control another nontoken non-Human creature with base toughness 2 or greater.

   Steps

How does this combo work?
1
Activate Altar of Dementia by sacrificing another nontoken non-Human creature
2
When the creature dies, its undying ability triggers, returning the creature from your graveyard to the battlefield with a +1/+1 counter on it.
3
Activate Altar of Dementia by sacrificing the creature with a +1/+1 counter on it.
4
When the creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
5
Resolve the Altar of Dementia abilities from step 1 and 3.
6
Repeat.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Infinite sacrifice triggers
Infinite death triggers
Infinite mill
Infinite self-mill
Eirdu, Carrier of Dawn
18%inclusion577 decks3.14K decks
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0.0%inclusion2 decks13.6K decks
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New Cards
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29%inclusion191 decks649 decks
28%synergy
Sunderflock
29%inclusion2 decks7 decks
27%synergy
Rhys, the Evermore
28%inclusion128 decks462 decks
27%synergy
Emptiness
28%inclusion179 decks649 decks
27%synergy
The Reaper, King No More
20%inclusion1 decks5 decks
13%synergy
High Synergy Cards
Ashnod's Altar
86%inclusion555 decks649 decks
79%synergy
Phyrexian Altar
77%inclusion498 decks649 decks
73%synergy
Viscera Seer
81%inclusion524 decks649 decks
73%synergy
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73%inclusion16 decks22 decks
71%synergy
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67%synergy
Carrion Feeder
70%inclusion453 decks649 decks
65%synergy
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65%synergy
Pitiless Plunderer
73%inclusion475 decks649 decks
65%synergy
Blood Artist
76%inclusion490 decks649 decks
64%synergy
Cruel Celebrant
71%inclusion461 decks649 decks
64%synergy
Top Cards
Swords to Plowshares
78%inclusion503 decks649 decks
16%synergy
Goblin Bombardment
68%inclusion15 decks22 decks
63%synergy
Luminous Broodmoth
66%inclusion430 decks649 decks
64%synergy
Skullclamp
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55%synergy
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60%synergy
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63%synergy
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62%synergy
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58%synergy
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37%synergy
Game Changers
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39%inclusion252 decks649 decks
20%synergy
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13%synergy
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10%synergy
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26%inclusion169 decks649 decks
11%synergy
Teferi's Protection
25%inclusion163 decks649 decks
8%synergy
Jeska's Will
23%inclusion5 decks22 decks
7%synergy
Gaea's Cradle
19%inclusion5 decks27 decks
13%synergy
Underworld Breach
18%inclusion4 decks22 decks
12%synergy
Gamble
18%inclusion4 decks22 decks
9%synergy
Ancient Tomb
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7%synergy
Creatures
Umbral Collar Zealot
60%inclusion390 decks649 decks
57%synergy
Marionette Apprentice
59%inclusion385 decks649 decks
55%synergy
Vizier of Remedies
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57%synergy
Glen Elendra Archmage
55%inclusion6 decks11 decks
52%synergy
Grim Haruspex
55%inclusion354 decks649 decks
52%synergy
Solemn Simulacrum
51%inclusion334 decks649 decks
39%synergy
Corpse Knight
50%inclusion324 decks649 decks
45%synergy
Eternal Witness
48%inclusion13 decks27 decks
31%synergy
Yawgmoth, Thran Physician
48%inclusion312 decks649 decks
45%synergy
Gray Merchant of Asphodel
48%inclusion312 decks649 decks
40%synergy
Sephiroth, Fabled SOLDIER
46%inclusion299 decks649 decks
44%synergy
Esper Sentinel
43%inclusion276 decks649 decks
24%synergy
Butcher Ghoul
42%inclusion275 decks649 decks
42%synergy
Scholar of New Horizons
41%inclusion264 decks649 decks
39%synergy
Witch Enchanter
41%inclusion263 decks649 decks
33%synergy
Bartolomé del Presidio
40%inclusion258 decks649 decks
35%synergy
Morbid Opportunist
37%inclusion242 decks649 decks
30%synergy
Kitchen Finks
37%inclusion10 decks27 decks
37%synergy
Aftermath Analyst
37%inclusion10 decks27 decks
33%synergy
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21%synergy
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37%inclusion10 decks27 decks
10%synergy
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35%inclusion228 decks649 decks
30%synergy
Woe Strider
34%inclusion220 decks649 decks
32%synergy
Midnight Reaper
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31%synergy
Wight of the Reliquary
33%inclusion9 decks27 decks
28%synergy
Lotho, Corrupt Shirriff
33%inclusion214 decks649 decks
20%synergy
Sun Titan
29%inclusion190 decks649 decks
21%synergy
River Kelpie
27%inclusion3 decks11 decks
26%synergy
Mulldrifter
27%inclusion3 decks11 decks
22%synergy
Mayhem Devil
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17%synergy
Braids, Arisen Nightmare
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20%synergy
Teysa Karlov
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22%synergy
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26%synergy
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25%synergy
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24%synergy
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18%synergy
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14%synergy
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23%synergy
Pawn of Ulamog
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22%synergy
Zack Fair
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22%synergy
Grand Abolisher
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14%synergy
Agate Instigator
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20%synergy
Anger
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16%synergy
Charismatic Conqueror
23%inclusion147 decks649 decks
19%synergy
Voice of Victory
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16%synergy
Safehold Elite
22%inclusion6 decks27 decks
22%synergy
Protean Hulk
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21%synergy
Lumra, Bellow of the Woods
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20%synergy
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15%synergy
Avacyn's Pilgrim
22%inclusion6 decks27 decks
10%synergy
Instants
Anguished Unmaking
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27%synergy
Deadly Dispute
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38%synergy
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32%synergy
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13%synergy
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16%synergy
Deflecting Swat
23%inclusion5 decks22 decks
6%synergy
Culling the Weak
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18%synergy
Heroic Intervention
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Despark
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7%synergy
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1%synergy
Eladamri's Call
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Entomb
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4%synergy
Saw in Half
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6%synergy
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6%synergy
Cabal Ritual
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Imp's Mischief
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4%synergy
Reprieve
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1%synergy
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3%synergy
Mortify
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-4%synergy
Sorceries
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53%inclusion345 decks649 decks
34%synergy
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Damn
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33%synergy
Diabolic Intent
45%inclusion295 decks649 decks
38%synergy
Toxic Deluge
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16%synergy
Three Visits
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5%synergy
Farseek
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-6%synergy
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11%synergy
Eerie Ultimatum
26%inclusion7 decks27 decks
15%synergy
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-6%synergy
Cultivate
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-20%synergy
Blasphemous Edict
19%inclusion121 decks649 decks
13%synergy
Ruinous Ultimatum
18%inclusion4 decks22 decks
-1%synergy
Blasphemous Act
18%inclusion4 decks22 decks
-15%synergy
Night's Whisper
16%inclusion105 decks649 decks
7%synergy
Bridgeworks Battle
15%inclusion4 decks27 decks
11%synergy
Agadeem's Awakening
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10%synergy
Austere Command
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1%synergy
Living Death
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6%synergy
Kodama's Reach
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6%synergy
Sevinne's Reclamation
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2%synergy
Sign in Blood
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0%synergy
Imperial Seal
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4%synergy
Farewell
8.5%inclusion55 decks649 decks
-4%synergy
Dread Return
7.4%inclusion48 decks649 decks
2%synergy
Kindle the Inner Flame
7.1%inclusion1 decks14 decks
7%synergy
Buried Alive
6.8%inclusion44 decks649 decks
1%synergy
Wrath of God
6.5%inclusion42 decks649 decks
2%synergy
Damnation
6.2%inclusion40 decks649 decks
0%synergy
Exsanguinate
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-1%synergy
Morningtide's Light
5.5%inclusion36 decks649 decks
5%synergy
Vindicate
5.4%inclusion35 decks649 decks
-1%synergy
Beseech the Mirror
5.2%inclusion34 decks649 decks
2%synergy
Feed the Swarm
5.2%inclusion34 decks649 decks
-11%synergy
Utility Artifacts
Lightning Greaves
47%inclusion302 decks649 decks
22%synergy
Blasting Station
40%inclusion258 decks649 decks
39%synergy
Swiftfoot Boots
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-3%synergy
The Great Henge
22%inclusion6 decks27 decks
13%synergy
Birthing Pod
19%inclusion5 decks27 decks
17%synergy
Hedge Shredder
19%inclusion5 decks27 decks
16%synergy
Oketra's Monument
13%inclusion86 decks649 decks
12%synergy
Bolas's Citadel
13%inclusion82 decks649 decks
5%synergy
Jet Medallion
12%inclusion81 decks649 decks
9%synergy
The One Ring
12%inclusion75 decks649 decks
3%synergy
Pearl Medallion
10%inclusion64 decks649 decks
7%synergy
Spawning Pit
7.2%inclusion47 decks649 decks
7%synergy
Enchantments
Bastion of Remembrance
57%inclusion371 decks649 decks
51%synergy
The Meathook Massacre
45%inclusion295 decks649 decks
40%synergy
Black Market Connections
36%inclusion236 decks649 decks
24%synergy
Mystic Remora
36%inclusion4 decks11 decks
20%synergy
Grave Pact
33%inclusion216 decks649 decks
29%synergy
Bitterblossom
32%inclusion208 decks649 decks
28%synergy
Thran Vigil
32%inclusion205 decks649 decks
31%synergy
Impact Tremors
27%inclusion6 decks22 decks
17%synergy
Phyrexian Arena
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11%synergy
Greater Good
26%inclusion7 decks27 decks
21%synergy
Land Tax
14%inclusion94 decks649 decks
8%synergy
Animate Dead
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5%synergy
Thunder of Unity
14%inclusion3 decks22 decks
12%synergy
Dictate of Erebos
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9%synergy
Tribute to the World Tree
11%inclusion3 decks27 decks
6%synergy
Sylvan Library
11%inclusion3 decks27 decks
2%synergy
Sothera, the Supervoid
11%inclusion72 decks649 decks
10%synergy
Funeral Room // Awakening Hall
11%inclusion72 decks649 decks
9%synergy
Necropotence
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5%synergy
Martyr's Cause
7.7%inclusion50 decks649 decks
7%synergy
Barrensteppe Siege
6.8%inclusion44 decks649 decks
5%synergy
Fanatical Devotion
6.2%inclusion40 decks649 decks
6%synergy
Trouble in Pairs
6.2%inclusion40 decks649 decks
2%synergy
Grave Venerations
5.7%inclusion26 decks454 decks
3%synergy
Blind Obedience
5.1%inclusion33 decks649 decks
-1%synergy
Planeswalkers
Grist, the Hunger Tide
22%inclusion6 decks27 decks
18%synergy
Liliana, Dreadhorde General
16%inclusion101 decks649 decks
12%synergy
Tyvar, Jubilant Brawler
15%inclusion4 decks27 decks
11%synergy
Vivien on the Hunt
11%inclusion3 decks27 decks
11%synergy
Vivien, Champion of the Wilds
11%inclusion3 decks27 decks
10%synergy
Elspeth, Storm Slayer
7.9%inclusion51 decks649 decks
3%synergy
Utility Lands
Phyrexian Tower
61%inclusion399 decks649 decks
53%synergy
Urborg, Tomb of Yawgmoth
44%inclusion286 decks649 decks
35%synergy
Bojuka Bog
44%inclusion283 decks649 decks
14%synergy
Boseiju, Who Endures
37%inclusion10 decks27 decks
18%synergy
Shifting Woodland
33%inclusion9 decks27 decks
26%synergy
High Market
32%inclusion205 decks649 decks
29%synergy
Reliquary Tower
29%inclusion188 decks649 decks
-1%synergy
Mistrise Village
27%inclusion3 decks11 decks
19%synergy
Otawara, Soaring City
27%inclusion3 decks11 decks
11%synergy
Takenuma, Abandoned Mire
26%inclusion169 decks649 decks
17%synergy
Cabal Coffers
22%inclusion144 decks649 decks
13%synergy
Susur Secundi, Void Altar
20%inclusion129 decks649 decks
17%synergy
Vault of the Archangel
19%inclusion121 decks649 decks
7%synergy
Eiganjo, Seat of the Empire
17%inclusion109 decks649 decks
10%synergy
Abandoned Air Temple
15%inclusion86 decks568 decks
10%synergy
Midgar, City of Mako
13%inclusion85 decks649 decks
9%synergy
Westvale Abbey
12%inclusion76 decks649 decks
10%synergy
Nesting Grounds
11%inclusion74 decks649 decks
9%synergy
Command Beacon
9.4%inclusion61 decks649 decks
4%synergy
Urza's Saga
9.2%inclusion60 decks649 decks
2%synergy
Spymaster's Vault
9.1%inclusion59 decks649 decks
6%synergy
Nykthos, Shrine to Nyx
6.6%inclusion43 decks649 decks
1%synergy
Mana Artifacts
Sol Ring
93%inclusion605 decks649 decks
10%synergy
Arcane Signet
89%inclusion579 decks649 decks
17%synergy
Talisman of Hierarchy
65%inclusion421 decks649 decks
39%synergy
Orzhov Signet
52%inclusion335 decks649 decks
28%synergy
Talisman of Conviction
45%inclusion10 decks22 decks
21%synergy
Talisman of Indulgence
45%inclusion10 decks22 decks
18%synergy
Fellwar Stone
30%inclusion194 decks649 decks
9%synergy
The Soul Stone
19%inclusion124 decks649 decks
15%synergy
Mind Stone
16%inclusion101 decks649 decks
1%synergy
Thought Vessel
15%inclusion95 decks649 decks
-3%synergy
Lotus Petal
11%inclusion73 decks649 decks
4%synergy
Chrome Mox
9.2%inclusion60 decks649 decks
3%synergy
Mana Vault
7.7%inclusion50 decks649 decks
2%synergy
Crowded Crypt
5.2%inclusion34 decks649 decks
4%synergy
Mox Diamond
5.1%inclusion33 decks649 decks
1%synergy
Lands
Breeding Pool
100%inclusion8 decks8 decks
58%synergy
Command Tower
90%inclusion583 decks649 decks
16%synergy
Temple Garden
85%inclusion23 decks27 decks
46%synergy
Godless Shrine
83%inclusion541 decks649 decks
42%synergy
Hallowed Fountain
82%inclusion9 decks11 decks
42%synergy
Overgrown Tomb
81%inclusion22 decks27 decks
40%synergy
Watery Grave
73%inclusion8 decks11 decks
31%synergy
Isolated Chapel
71%inclusion464 decks649 decks
38%synergy
Vault of Champions
65%inclusion425 decks649 decks
42%synergy
Caves of Koilos
64%inclusion413 decks649 decks
34%synergy
Blood Crypt
64%inclusion14 decks22 decks
26%synergy
Stomping Ground
63%inclusion5 decks8 decks
21%synergy
Shattered Sanctum
60%inclusion388 decks649 decks
45%synergy
Savai Triome
59%inclusion13 decks22 decks
35%synergy
Marsh Flats
59%inclusion380 decks649 decks
48%synergy
Sacred Foundry
55%inclusion12 decks22 decks
18%synergy
Bleachbone Verge
53%inclusion344 decks649 decks
45%synergy
Fetid Heath
53%inclusion343 decks649 decks
39%synergy
Indatha Triome
52%inclusion14 decks27 decks
24%synergy
Zagoth Triome
50%inclusion4 decks8 decks
22%synergy
Steam Vents
50%inclusion4 decks8 decks
12%synergy
Tainted Field
48%inclusion310 decks649 decks
35%synergy
Shadowy Backstreet
43%inclusion282 decks649 decks
33%synergy
Spectator Seating
41%inclusion9 decks22 decks
18%synergy
Undergrowth Stadium
41%inclusion11 decks27 decks
17%synergy
Brightclimb Pathway
40%inclusion257 decks649 decks
31%synergy
Spara's Headquarters
38%inclusion3 decks8 decks
10%synergy
Jetmir's Garden
38%inclusion3 decks8 decks
9%synergy
Underground Mortuary
37%inclusion10 decks27 decks
24%synergy
Bountiful Promenade
37%inclusion10 decks27 decks
15%synergy
Luxury Suite
36%inclusion8 decks22 decks
12%synergy
Sunpetal Grove
33%inclusion9 decks27 decks
5%synergy
Woodland Cemetery
33%inclusion9 decks27 decks
1%synergy
Shineshadow Snarl
32%inclusion207 decks649 decks
19%synergy
Sulfurous Springs
32%inclusion7 decks22 decks
8%synergy
Wastewood Verge
30%inclusion8 decks27 decks
22%synergy
Lush Portico
30%inclusion8 decks27 decks
20%synergy
Savannah
30%inclusion8 decks27 decks
17%synergy
Bayou
30%inclusion8 decks27 decks
16%synergy
Exotic Orchard
30%inclusion192 decks649 decks
-7%synergy
Tundra
27%inclusion3 decks11 decks
13%synergy
Morphic Pool
27%inclusion3 decks11 decks
3%synergy
Raffine's Tower
27%inclusion3 decks11 decks
3%synergy
Sea of Clouds
27%inclusion3 decks11 decks
3%synergy
Battlefield Forge
27%inclusion6 decks22 decks
-1%synergy
Dragonskull Summit
27%inclusion6 decks22 decks
-7%synergy
Clifftop Retreat
27%inclusion6 decks22 decks
-8%synergy
Deathcap Glade
26%inclusion7 decks27 decks
13%synergy
Silent Clearing
23%inclusion152 decks649 decks
19%synergy
Elegant Parlor
23%inclusion5 decks22 decks
15%synergy