Mairsil, the Pretender + Endling + Cauldron of Souls + Blood Vassal + Anger

Mairsil, the Pretender
Endling
Cauldron of Souls
Blood Vassal
Anger

Requires
Mairsil, the Pretender must be on the battlefield. Endling must be in exile. Cauldron of Souls must be in exile. Blood Vassal must be in exile. Anger must be in the graveyard. You control a Mountain.
Steps
  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
Infinite black mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Mairsil, the Pretender
1.08% of 1576 decks 17 decks
New Cards
Marvin, Murderous Mimic
100% of 3 decks +98% synergy
High Synergy Cards
Aetherling
100% of 17 decks +99% synergy
Nevinyrral's Disk
94% of 17 decks +93% synergy
Arcanis the Omnipotent
88% of 17 decks +87% synergy
Torchling
82% of 17 decks +82% synergy
Asmodeus the Archfiend
82% of 17 decks +82% synergy
Unmarked Grave
82% of 17 decks +80% synergy
Buried Alive
82% of 17 decks +79% synergy
Cinderhaze Wretch
76% of 17 decks +76% synergy
Quicksilver Elemental
76% of 17 decks +76% synergy
Cavern Harpy
76% of 17 decks +76% synergy
Top Cards
Gilded Lotus
82% of 17 decks +78% synergy
Windfall
76% of 17 decks +52% synergy
Morphling
71% of 17 decks +70% synergy
Staff of Domination
71% of 17 decks +70% synergy
Oriq Loremage
71% of 17 decks +70% synergy
Walking Ballista
65% of 17 decks +64% synergy
Entomb
65% of 17 decks +58% synergy
Faithless Looting
65% of 17 decks +45% synergy
Hateflayer
59% of 17 decks +58% synergy
Pendant of Prosperity
59% of 17 decks +58% synergy
Creatures
Ulamog's Dreadsire
100% of 3 decks +100% synergy
Tree of Perdition
59% of 17 decks +58% synergy
Pack Rat
53% of 17 decks +51% synergy
Horseshoe Crab
47% of 17 decks +47% synergy
Pili-Pala
47% of 17 decks +47% synergy
Jace's Archivist
47% of 17 decks +40% synergy
Ovinomancer
41% of 17 decks +41% synergy
Argivian Avenger
36% of 14 decks +36% synergy
Anthroplasm
35% of 17 decks +35% synergy
Crystalline Crawler
35% of 17 decks +35% synergy
Eater of the Dead
35% of 17 decks +35% synergy
Shauku, Endbringer
35% of 17 decks +35% synergy
Sage of Hours
29% of 17 decks +29% synergy
Mirror-Mad Phantasm
29% of 17 decks +29% synergy
Minion of Leshrac
29% of 17 decks +29% synergy
Blood Pet
29% of 17 decks +29% synergy
Thassa, Deep-Dwelling
29% of 17 decks +26% synergy
Myr Propagator
24% of 17 decks +23% synergy
Blighted Bat
24% of 17 decks +23% synergy
Spikeshot Elder
24% of 17 decks +23% synergy
Triskelion
24% of 17 decks +23% synergy
Deathbringer Thoctar
24% of 17 decks +23% synergy
Mercurial Chemister
24% of 17 decks +23% synergy
Goro-Goro, Disciple of Ryusei
24% of 17 decks +22% synergy
Spark Double
24% of 17 decks +15% synergy
Omen Hawker
23% of 13 decks +22% synergy
Shriekdiver
18% of 17 decks +18% synergy
Farmstead Gleaner
18% of 17 decks +18% synergy
Patron of the Moon
18% of 17 decks +18% synergy
Magus of the Bazaar
18% of 17 decks +18% synergy
Grinning Ignus
18% of 17 decks +17% synergy
Argent Sphinx
18% of 17 decks +17% synergy
Cephalid Inkshrouder
18% of 17 decks +17% synergy
Doom Whisperer
18% of 17 decks +16% synergy
Galecaster Colossus
18% of 17 decks +16% synergy
Displacer Kitten
18% of 17 decks +14% synergy
Instants
Frantic Search
59% of 17 decks +45% synergy
Vampiric Tutor
47% of 17 decks +28% synergy
Counterspell
47% of 17 decks +3% synergy
Mana Drain
41% of 17 decks +25% synergy
Essence Flux
35% of 17 decks +32% synergy
Thrill of Possibility
35% of 17 decks +27% synergy
Mystical Tutor
35% of 17 decks +20% synergy
Blur
29% of 17 decks +28% synergy
An Offer You Can't Refuse
29% of 17 decks +8% synergy
Planar Incision
24% of 17 decks +22% synergy
Intuition
24% of 17 decks +21% synergy
Ghostly Flicker
24% of 17 decks +17% synergy
Fact or Fiction
24% of 17 decks +12% synergy
Swan Song
24% of 17 decks +6% synergy
Negate
24% of 17 decks -0% synergy
Arcane Denial
24% of 17 decks -4% synergy
Cyclonic Rift
24% of 17 decks -5% synergy
Dark Ritual
24% of 17 decks -6% synergy
Chaos Warp
24% of 17 decks -17% synergy
Thirst for Knowledge
18% of 17 decks +15% synergy
Malakir Rebirth
18% of 17 decks +11% synergy
Deflecting Swat
18% of 17 decks +1% synergy
Fierce Guardianship
18% of 17 decks -1% synergy
Terminate
18% of 17 decks -11% synergy
Sorceries
Gamble
59% of 17 decks +49% synergy
Demonic Tutor
53% of 17 decks +29% synergy
Careful Study
35% of 17 decks +34% synergy
Cathartic Reunion
35% of 17 decks +33% synergy
Feed the Swarm
35% of 17 decks -1% synergy
Blasphemous Act
35% of 17 decks -14% synergy
Final Parting
29% of 17 decks +28% synergy
Grim Tutor
29% of 17 decks +25% synergy
Wheel of Fortune
29% of 17 decks +20% synergy
Reckless Handling
27% of 11 decks +26% synergy
Ponder
24% of 17 decks +13% synergy
Toxic Deluge
24% of 17 decks +3% synergy
Imperial Seal
18% of 17 decks +11% synergy
Damnation
18% of 17 decks +7% synergy
Vandalblast
18% of 17 decks -0% synergy
Utility Artifacts
Thousand-Year Elixir
59% of 17 decks +58% synergy
Mirage Mirror
35% of 17 decks +34% synergy
Conjurer's Closet
35% of 17 decks +32% synergy
Phyrexian Altar
35% of 17 decks +31% synergy
The One Ring
31% of 13 decks +16% synergy
Swiftfoot Boots
29% of 17 decks +3% synergy
Lightning Greaves
24% of 17 decks -6% synergy
Netherborn Altar
18% of 17 decks +17% synergy
Enchantments
Rising of the Day
55% of 11 decks +50% synergy
Rhystic Study
29% of 17 decks +2% synergy
Candlekeep Sage
24% of 17 decks +23% synergy
Training Grounds
24% of 17 decks +23% synergy
Propaganda
18% of 17 decks +5% synergy
Utility Lands
Riptide Laboratory
59% of 17 decks +55% synergy
Minamo, School at Water's Edge
47% of 17 decks +44% synergy
Sanctum of Eternity
35% of 17 decks +35% synergy
Otawara, Soaring City
35% of 17 decks +20% synergy
Vault of Whispers
29% of 17 decks +24% synergy
Great Furnace
29% of 17 decks +24% synergy
Seat of the Synod
29% of 17 decks +23% synergy
Bojuka Bog
29% of 17 decks +4% synergy
Flamekin Village
24% of 17 decks +23% synergy
Command Beacon
24% of 17 decks +19% synergy
Reliquary Tower
24% of 17 decks -11% synergy
Desolate Lighthouse
18% of 17 decks +11% synergy
Geier Reach Sanitarium
18% of 17 decks +11% synergy
Urborg, Tomb of Yawgmoth
18% of 17 decks +2% synergy
Mana Artifacts
Arcane Signet
76% of 17 decks -12% synergy
Sol Ring
76% of 17 decks -14% synergy
Talisman of Dominance
59% of 17 decks +12% synergy
Talisman of Creativity
53% of 17 decks +8% synergy
Izzet Signet
47% of 17 decks +7% synergy
Dimir Signet
47% of 17 decks +3% synergy
Coveted Jewel
41% of 17 decks +40% synergy
Fellwar Stone
41% of 17 decks +6% synergy
Talisman of Indulgence
41% of 17 decks +1% synergy
Basalt Monolith
29% of 17 decks +27% synergy
Chromatic Orrery
24% of 17 decks +23% synergy
Prismatic Geoscope
18% of 17 decks +18% synergy
Nyx Lotus
18% of 17 decks +17% synergy
Rakdos Signet
18% of 17 decks -25% synergy
Lands
Thundering Falls
86% of 7 decks +72% synergy
Undercity Sewers
86% of 7 decks +70% synergy
Command Tower
82% of 17 decks -10% synergy
Xander's Lounge
71% of 17 decks +27% synergy
Blood Crypt
65% of 17 decks +21% synergy
Steam Vents
65% of 17 decks +21% synergy
Watery Grave
65% of 17 decks +20% synergy
Raucous Theater
57% of 7 decks +43% synergy
Training Center
53% of 17 decks +17% synergy
Polluted Delta
47% of 17 decks +17% synergy
Scalding Tarn
47% of 17 decks +16% synergy
Exotic Orchard
47% of 17 decks -10% synergy
Misty Rainforest
41% of 17 decks +31% synergy
Bloodstained Mire
41% of 17 decks +11% synergy
Luxury Suite
41% of 17 decks +7% synergy
Morphic Pool
41% of 17 decks +7% synergy
Flooded Strand
35% of 17 decks +25% synergy
Marsh Flats
35% of 17 decks +25% synergy
City of Brass
35% of 17 decks +22% synergy
Sulfur Falls
35% of 17 decks -7% synergy
Wooded Foothills
29% of 17 decks +21% synergy
Verdant Catacombs
29% of 17 decks +20% synergy
Badlands
29% of 17 decks +15% synergy
Smoldering Marsh
29% of 17 decks -9% synergy
Drowned Catacomb
29% of 17 decks -10% synergy
Dragonskull Summit
29% of 17 decks -12% synergy
Sunken Hollow
29% of 17 decks -12% synergy
Cavern of Souls
24% of 17 decks +18% synergy
Arid Mesa
24% of 17 decks +14% synergy
Mana Confluence
24% of 17 decks +12% synergy
Volcanic Island
24% of 17 decks +10% synergy
Underground Sea
24% of 17 decks +10% synergy
Maestros Theater
18% of 17 decks +4% synergy
Rakdos Carnarium
18% of 17 decks +3% synergy
Izzet Boilerworks
18% of 17 decks +3% synergy
Dimir Aqueduct
18% of 17 decks +2% synergy
Terramorphic Expanse
18% of 17 decks -6% synergy
Underground River
18% of 17 decks -7% synergy
Crumbling Necropolis
18% of 17 decks -41% synergy