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%inclusion16 decks1.94K decks
High Synergy Cards
Torchling
100%inclusion16 decks16 decks
100%synergy
Quicksilver Elemental
94%inclusion15 decks16 decks
93%synergy
Pendant of Prosperity
94%inclusion15 decks16 decks
93%synergy
Aetherling
94%inclusion15 decks16 decks
93%synergy
Nevinyrral's Disk
88%inclusion14 decks16 decks
87%synergy
Arcanis the Omnipotent
88%inclusion14 decks16 decks
86%synergy
Morphling
81%inclusion13 decks16 decks
81%synergy
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81%synergy
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81%inclusion13 decks16 decks
81%synergy
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81%synergy
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81%inclusion13 decks16 decks
81%synergy
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81%synergy
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Buried Alive
75%inclusion12 decks16 decks
71%synergy
Frantic Search
75%inclusion12 decks16 decks
55%synergy
Faithless Looting
69%inclusion11 decks16 decks
49%synergy
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63%inclusion10 decks16 decks
62%synergy
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60%synergy
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56%inclusion9 decks16 decks
56%synergy
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56%inclusion9 decks16 decks
56%synergy
Game Changers
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38%inclusion6 decks16 decks
25%synergy
Gifts Ungiven
25%inclusion4 decks16 decks
23%synergy
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19%inclusion3 decks16 decks
17%synergy
Gamble
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9%synergy
Creatures
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56%inclusion9 decks16 decks
56%synergy
Ovinomancer
50%inclusion8 decks16 decks
50%synergy
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50%inclusion7 decks14 decks
50%synergy
Anthroplasm
44%inclusion7 decks16 decks
44%synergy
Crystalline Crawler
44%inclusion7 decks16 decks
44%synergy
Vivi Ornitier
43%inclusion3 decks7 decks
35%synergy
Argent Sphinx
38%inclusion6 decks16 decks
37%synergy
Cephalid Inkshrouder
38%inclusion6 decks16 decks
37%synergy
Mercurial Chemister
38%inclusion6 decks16 decks
37%synergy
Walking Ballista
38%inclusion6 decks16 decks
37%synergy
Doom Whisperer
38%inclusion6 decks16 decks
37%synergy
Galecaster Colossus
38%inclusion6 decks16 decks
36%synergy
Jace's Archivist
38%inclusion6 decks16 decks
31%synergy
Spark Double
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30%synergy
Myr Propagator
31%inclusion5 decks16 decks
31%synergy
Blighted Bat
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31%synergy
Sage of Hours
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Minion of Leshrac
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31%synergy
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31%inclusion5 decks16 decks
31%synergy
Blood Pet
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31%synergy
Arco-Flagellant
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25%synergy
Dralnu, Lich Lord
25%inclusion4 decks16 decks
25%synergy
Magus of the Bazaar
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25%synergy
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25%synergy
Chainer, Dementia Master
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25%synergy
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Ulamog's Dreadsire
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Knacksaw Clique
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Kozilek, the Great Distortion
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19%synergy
Deathbringer Thoctar
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18%synergy
Goro-Goro, Disciple of Ryusei
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Deadeye Navigator
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Ledger Shredder
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Instants
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17%synergy
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Deflecting Swat
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Sorceries
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Careful Study
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Reckless Handling
19%inclusion3 decks16 decks
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Damnation
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Utility Artifacts
Mirage Mirror
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Swiftfoot Boots
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Lightning Greaves
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2%synergy
Wayfarer's Bauble
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Crystal Shard
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Enchantments
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31%inclusion5 decks16 decks
31%synergy
Rising of the Day
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22%synergy
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19%synergy
Propaganda
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Riptide Laboratory
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78%synergy
Desolate Lighthouse
44%inclusion7 decks16 decks
38%synergy
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Great Furnace
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Command Beacon
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Mana Artifacts
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Coveted Jewel
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17%synergy
Mind Stone
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Lands
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-10%synergy
Watery Grave
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16%synergy
Drowned Catacomb
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14%synergy
Steam Vents
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11%synergy
Blood Crypt
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11%synergy
Sulfur Falls
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10%synergy
Exotic Orchard
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Scalding Tarn
44%inclusion7 decks16 decks
11%synergy
Dragonskull Summit
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Crumbling Necropolis
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-10%synergy
Thundering Falls
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27%synergy
Haunted Ridge
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16%synergy
Shipwreck Marsh
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13%synergy
Stormcarved Coast
38%inclusion6 decks16 decks
12%synergy
Luxury Suite
38%inclusion6 decks16 decks
6%synergy
Polluted Delta
38%inclusion6 decks16 decks
3%synergy
Bloodstained Mire
38%inclusion6 decks16 decks
3%synergy
Raucous Theater
31%inclusion5 decks16 decks
20%synergy
Undercity Sewers
31%inclusion5 decks16 decks
19%synergy
Shivan Reef
31%inclusion5 decks16 decks
2%synergy
Morphic Pool
31%inclusion5 decks16 decks
-1%synergy
Smoldering Marsh
31%inclusion5 decks16 decks
-6%synergy
Sunken Hollow
31%inclusion5 decks16 decks
-8%synergy
Fabled Passage
25%inclusion4 decks16 decks
18%synergy
Underground River
25%inclusion4 decks16 decks
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-6%synergy
Grixis Panorama
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15%synergy
Mistvault Bridge
19%inclusion3 decks16 decks
15%synergy
Misty Rainforest
19%inclusion3 decks16 decks
9%synergy
Temple of Deceit
19%inclusion3 decks16 decks
6%synergy
Temple of Epiphany
19%inclusion3 decks16 decks
4%synergy
Volcanic Island
19%inclusion3 decks16 decks
4%synergy
Underground Sea
19%inclusion3 decks16 decks
4%synergy
Badlands
19%inclusion3 decks16 decks
3%synergy
Terramorphic Expanse
19%inclusion3 decks16 decks
-1%synergy
Evolving Wilds
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-5%synergy
Sulfurous Springs
19%inclusion3 decks16 decks
-9%synergy
Training Center
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-13%synergy