Mairsil, the Pretender
Endling
Cauldron of Souls
Blood Vassal
Thousand-Year Elixir

   Prerequisites

What do I need to start this combo?
Mairsil and Thousand-Year Elixir on the battlefield.
All other permanents in exile.

   Steps

How does this combo work?
1
Activate Mairsil using Cauldron of Souls' ability by tapping it, giving itself persist until end of turn.
2
Activate Mairsil using Blood Vassal's ability by sacrificing it, adding .
3
When Mairsil dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
4
Activate Mairsil using Endling's third ability by paying , giving Mairsil undying until end of turn.
5
Activate Mairsil using Blood Vassal's ability by sacrificing it, adding .
6
When Mairsil dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7
Repeat.

   Results

What do I get from this combo?
Infinite black mana
Infinite death triggers
Infinite ETB
Infinite LTB
Infinite sacrifice triggers
Mairsil, the Pretender
0.8%inclusion15 decks1.81K decks
High Synergy Cards
Torchling
100%inclusion15 decks15 decks
100%synergy
Quicksilver Elemental
93%inclusion14 decks15 decks
93%synergy
Pendant of Prosperity
93%inclusion14 decks15 decks
93%synergy
Aetherling
93%inclusion14 decks15 decks
93%synergy
Tree of Perdition
87%inclusion13 decks15 decks
86%synergy
Nevinyrral's Disk
87%inclusion13 decks15 decks
86%synergy
Arcanis the Omnipotent
87%inclusion13 decks15 decks
85%synergy
Morphling
80%inclusion12 decks15 decks
80%synergy
Hateflayer
80%inclusion12 decks15 decks
80%synergy
Cavern Harpy
80%inclusion12 decks15 decks
80%synergy
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Asmodeus the Archfiend
80%inclusion12 decks15 decks
80%synergy
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80%inclusion12 decks15 decks
80%synergy
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80%inclusion12 decks15 decks
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Buried Alive
73%inclusion11 decks15 decks
70%synergy
Frantic Search
67%inclusion10 decks15 decks
48%synergy
Faithless Looting
67%inclusion10 decks15 decks
47%synergy
Horseshoe Crab
60%inclusion9 decks15 decks
60%synergy
Oriq Loremage
60%inclusion9 decks15 decks
59%synergy
Pack Rat
60%inclusion9 decks15 decks
58%synergy
Ovinomancer
53%inclusion8 decks15 decks
53%synergy
Game Changers
The One Ring
33%inclusion5 decks15 decks
20%synergy
Gamble
27%inclusion4 decks15 decks
17%synergy
Intuition
20%inclusion3 decks15 decks
18%synergy
Fierce Guardianship
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0%synergy
Creatures
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47%inclusion7 decks15 decks
47%synergy
Crystalline Crawler
47%inclusion7 decks15 decks
46%synergy
Cephalid Inkshrouder
47%inclusion7 decks15 decks
46%synergy
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47%inclusion7 decks15 decks
46%synergy
Marvin, Murderous Mimic
42%inclusion5 decks12 decks
41%synergy
Anthroplasm
40%inclusion6 decks15 decks
40%synergy
Argent Sphinx
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40%synergy
Walking Ballista
40%inclusion6 decks15 decks
39%synergy
Galecaster Colossus
40%inclusion6 decks15 decks
39%synergy
Spikeshot Elder
33%inclusion5 decks15 decks
33%synergy
Eater of the Dead
33%inclusion5 decks15 decks
33%synergy
Triskelion
33%inclusion5 decks15 decks
33%synergy
Mercurial Chemister
33%inclusion5 decks15 decks
33%synergy
Blood Pet
33%inclusion5 decks15 decks
33%synergy
Doom Whisperer
33%inclusion5 decks15 decks
32%synergy
Jace's Archivist
33%inclusion5 decks15 decks
27%synergy
Myr Propagator
27%inclusion4 decks15 decks
27%synergy
Blighted Bat
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Sage of Hours
27%inclusion4 decks15 decks
27%synergy
Dralnu, Lich Lord
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27%synergy
Magus of the Bazaar
27%inclusion4 decks15 decks
27%synergy
Goro-Goro, Disciple of Ryusei
27%inclusion4 decks15 decks
26%synergy
Spark Double
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19%synergy
Ulamog's Dreadsire
23%inclusion3 decks13 decks
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20%synergy
Arco-Flagellant
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20%synergy
Minion of Leshrac
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Deathbringer Thoctar
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Sakashima the Impostor
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Thassa, Deep-Dwelling
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Instants
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Essence Flux
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Fact or Fiction
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Teferi's Time Twist
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Thrill of Possibility
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Blur
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Thirst for Knowledge
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Deflecting Swat
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Terminate
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Chaos Warp
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Sorceries
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Windfall
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Unmarked Grave
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Final Parting
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26%synergy
Cathartic Reunion
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Feed the Swarm
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Reckless Handling
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Careful Study
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Utility Artifacts
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53%inclusion8 decks15 decks
52%synergy
Conjurer's Closet
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Swiftfoot Boots
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14%synergy
Lightning Greaves
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Wayfarer's Bauble
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Enchantments
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26%synergy
Rising of the Day
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Candlekeep Sage
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20%synergy
Utility Lands
Riptide Laboratory
80%inclusion12 decks15 decks
76%synergy
Sanctum of Eternity
47%inclusion7 decks15 decks
46%synergy
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44%synergy
Great Furnace
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41%synergy
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47%inclusion7 decks15 decks
41%synergy
Desolate Lighthouse
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34%synergy
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Urborg, Tomb of Yawgmoth
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Cephalid Coliseum
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Command Beacon
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15%synergy
Mana Artifacts
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Sol Ring
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Dimir Signet
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Talisman of Creativity
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Talisman of Dominance
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Coveted Jewel
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Basalt Monolith
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Mind Stone
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Lands
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13%synergy
Exotic Orchard
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Drowned Catacomb
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11%synergy
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10%synergy
Blood Crypt
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Sulfur Falls
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Luxury Suite
47%inclusion7 decks15 decks
15%synergy
Morphic Pool
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14%synergy
Dragonskull Summit
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2%synergy
Crumbling Necropolis
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Shivan Reef
40%inclusion6 decks15 decks
11%synergy
Smoldering Marsh
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2%synergy
Sunken Hollow
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0%synergy
Fabled Passage
33%inclusion5 decks15 decks
26%synergy
Haunted Ridge
33%inclusion5 decks15 decks
12%synergy
Shipwreck Marsh
33%inclusion5 decks15 decks
8%synergy
Stormcarved Coast
33%inclusion5 decks15 decks
8%synergy
Scalding Tarn
33%inclusion5 decks15 decks
1%synergy
Training Center
33%inclusion5 decks15 decks
1%synergy
Thundering Falls
27%inclusion4 decks15 decks
16%synergy
Terramorphic Expanse
27%inclusion4 decks15 decks
6%synergy
Underground River
27%inclusion4 decks15 decks
0%synergy
Path of Ancestry
27%inclusion4 decks15 decks
-4%synergy
Polluted Delta
27%inclusion4 decks15 decks
-7%synergy
Bloodstained Mire
27%inclusion4 decks15 decks
-8%synergy
Grixis Panorama
20%inclusion3 decks15 decks
16%synergy
Mistvault Bridge
20%inclusion3 decks15 decks
16%synergy
Raucous Theater
20%inclusion3 decks15 decks
9%synergy
Undercity Sewers
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8%synergy
Temple of Deceit
20%inclusion3 decks15 decks
6%synergy
Temple of Epiphany
20%inclusion3 decks15 decks
5%synergy
Evolving Wilds
20%inclusion3 decks15 decks
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Sulfurous Springs
20%inclusion3 decks15 decks
-7%synergy