Mairsil, the Pretender + Endling + Blood Pet + Crystalline Crawler

Mairsil, the Pretender
Endling
Blood Pet
Crystalline Crawler

Requires
Mairsil, the Pretender must be on the battlefield. Endling must be in exile. Blood Pet must be in exile. Crystalline Crawler must be in exile. Mairsil does not have a +1/+1 counter on it. Mana needed:
Steps
  1. Activate Mairsil using Endling's third ability by paying , giving Mairsil undying until end of turn.
  2. Activate Mairsil using Blood Pet's ability by sacrificing it, adding .
  3. Mairsil dies, triggering its undying ability, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  4. Activate Mairsil using Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding one mana of any color.
  5. Repeat.
Results
Infinite colored mana. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Mairsil, the Pretender
2.63% of 1520 decks 40 decks
High Synergy Cards
Aetherling
98% of 40 decks +97% synergy
Quicksilver Elemental
88% of 40 decks +87% synergy
Nevinyrral's Disk
88% of 40 decks +86% synergy
Torchling
80% of 40 decks +79% synergy
Arcanis the Omnipotent
80% of 40 decks +78% synergy
Gilded Lotus
82% of 40 decks +78% synergy
Buried Alive
80% of 40 decks +76% synergy
Asmodeus the Archfiend
74% of 39 decks +74% synergy
Blood Vassal
70% of 40 decks +70% synergy
Triskelion
70% of 40 decks +70% synergy
Top Cards
Faithless Looting
75% of 40 decks +55% synergy
Anger
70% of 40 decks +61% synergy
Horseshoe Crab
65% of 40 decks +65% synergy
Staff of Domination
65% of 40 decks +64% synergy
Entomb
62% of 40 decks +56% synergy
Pendant of Prosperity
60% of 40 decks +59% synergy
Frantic Search
60% of 40 decks +45% synergy
Windfall
60% of 40 decks +36% synergy
Collector's Vault
57% of 7 decks +56% synergy
Cavern Harpy
55% of 40 decks +55% synergy
Creatures
Walking Ballista
55% of 40 decks +54% synergy
Morphling
52% of 40 decks +52% synergy
Oriq Loremage
51% of 39 decks +50% synergy
Tree of Perdition
48% of 40 decks +47% synergy
Sage of Hours
45% of 40 decks +45% synergy
Pili-Pala
45% of 40 decks +45% synergy
Hateflayer
45% of 40 decks +45% synergy
Anthroplasm
42% of 40 decks +42% synergy
Spikeshot Elder
40% of 40 decks +40% synergy
Shauku, Endbringer
40% of 40 decks +40% synergy
Cinderhaze Wretch
38% of 40 decks +37% synergy
Pack Rat
35% of 40 decks +34% synergy
Mirror-Mad Phantasm
32% of 40 decks +32% synergy
Jace's Archivist
32% of 40 decks +25% synergy
Displacer Kitten
29% of 34 decks +25% synergy
Thassa's Oracle
28% of 39 decks +20% synergy
Mercurial Chemister
28% of 40 decks +27% synergy
Arco-Flagellant
26% of 27 decks +26% synergy
Thassa, Deep-Dwelling
26% of 39 decks +22% synergy
Ovinomancer
25% of 40 decks +25% synergy
Cephalid Inkshrouder
25% of 40 decks +25% synergy
Minion of Leshrac
25% of 40 decks +25% synergy
Deadeye Navigator
25% of 40 decks +23% synergy
Avatar of Woe
22% of 40 decks +22% synergy
Deathbringer Thoctar
22% of 40 decks +22% synergy
Spark Double
22% of 40 decks +14% synergy
Death Cultist
20% of 40 decks +20% synergy
Soliton
20% of 40 decks +20% synergy
Nightscape Familiar
20% of 40 decks -6% synergy
Goro-Goro, Disciple of Ryusei
19% of 36 decks +18% synergy
Amaranthine Wall
18% of 40 decks +17% synergy
Magus of the Bazaar
18% of 40 decks +17% synergy
Skyship Stalker
15% of 40 decks +15% synergy
Skirge Familiar
15% of 40 decks +15% synergy
Doom Whisperer
15% of 40 decks +14% synergy
Solphim, Mayhem Dominus
14% of 21 decks +8% synergy
Sakashima of a Thousand Faces
13% of 39 decks +10% synergy
Farmstead Gleaner
12% of 40 decks +12% synergy
Grinning Ignus
12% of 40 decks +12% synergy
Eater of the Dead
12% of 40 decks +12% synergy
Magus of the Wheel
12% of 40 decks +5% synergy
Dockside Extortionist
12% of 40 decks -7% synergy
Argivian Avenger
12% of 25 decks +12% synergy
Knacksaw Clique
10% of 40 decks +10% synergy
Blighted Bat
10% of 40 decks +10% synergy
Argent Sphinx
10% of 40 decks +10% synergy
Necrotic Ooze
10% of 40 decks +10% synergy
Fatestitcher
10% of 40 decks +9% synergy
Notion Thief
10% of 40 decks +0% synergy
Myr Propagator
8% of 40 decks +7% synergy
Instants
Counterspell
52% of 40 decks +8% synergy
Ghostly Flicker
50% of 40 decks +43% synergy
Essence Flux
48% of 40 decks +44% synergy
Thrill of Possibility
48% of 40 decks +39% synergy
Planar Incision
39% of 36 decks +37% synergy
Fact or Fiction
38% of 40 decks +25% synergy
Negate
38% of 40 decks +14% synergy
Blur
35% of 34 decks +34% synergy
Arcane Denial
30% of 40 decks +3% synergy
Chaos Warp
30% of 40 decks -11% synergy
Forbidden Alchemy
28% of 40 decks +25% synergy
Terminate
28% of 40 decks -1% synergy
Cyclonic Rift
28% of 40 decks -1% synergy
Deflecting Swat
23% of 39 decks +7% synergy
Fierce Guardianship
23% of 39 decks +4% synergy
Teferi's Time Twist
20% of 40 decks +18% synergy
Thought Scour
20% of 40 decks +18% synergy
Izzet Charm
20% of 40 decks +17% synergy
Evacuation
20% of 40 decks +17% synergy
Displace
18% of 40 decks +15% synergy
Reality Shift
18% of 40 decks +11% synergy
Rakdos Charm
18% of 40 decks +2% synergy
Mana Drain
18% of 40 decks +1% synergy
Vampiric Tutor
18% of 40 decks -2% synergy
Hostile Negotiations
16% of 25 decks +15% synergy
Intuition
15% of 40 decks +13% synergy
Force of Will
15% of 40 decks +4% synergy
Consider
14% of 37 decks +8% synergy
Bedevil
12% of 40 decks -10% synergy
Maestros Charm
11% of 36 decks +5% synergy
Infernal Grasp
11% of 37 decks +4% synergy
Thirst for Knowledge
10% of 40 decks +7% synergy
Dispel
10% of 40 decks +6% synergy
Opt
10% of 40 decks +5% synergy
Force of Negation
10% of 40 decks +1% synergy
Swan Song
10% of 40 decks -7% synergy
Brainstorm
10% of 40 decks -11% synergy
Malakir Rebirth
8% of 39 decks +1% synergy
Ancient Excavation
8% of 40 decks +7% synergy
Stubborn Denial
8% of 40 decks +6% synergy
Countersquall
8% of 40 decks +5% synergy
Dramatic Reversal
8% of 40 decks +5% synergy
Crosis's Charm
8% of 40 decks +3% synergy
Demonic Consultation
8% of 40 decks +0% synergy
Pact of Negation
8% of 40 decks -1% synergy
Mystical Tutor
8% of 40 decks -8% synergy
Dark Ritual
8% of 40 decks -22% synergy
Sorceries
Unmarked Grave
49% of 39 decks +47% synergy
Cathartic Reunion
48% of 40 decks +46% synergy
Blasphemous Act
38% of 40 decks -12% synergy
Gamble
35% of 40 decks +26% synergy
Demonic Tutor
35% of 40 decks +11% synergy
Final Parting
30% of 40 decks +29% synergy
Reckless Handling
29% of 17 decks +29% synergy
Ransack the Lab
25% of 40 decks +25% synergy
Vandalblast
25% of 40 decks +6% synergy
Tormenting Voice
22% of 40 decks +21% synergy
Careful Study
22% of 40 decks +21% synergy
Whispering Madness
20% of 40 decks +13% synergy
Feed the Swarm
18% of 39 decks -18% synergy
Strategic Planning
18% of 40 decks +17% synergy
Treasure Cruise
15% of 40 decks +10% synergy
Necromantic Selection
12% of 40 decks +11% synergy
Grim Tutor
12% of 40 decks +8% synergy
Toxic Deluge
12% of 40 decks -7% synergy
Profane Tutor
10% of 39 decks +4% synergy
Jeska's Will
10% of 39 decks -7% synergy
Notion Rain
10% of 40 decks +10% synergy
By Force
10% of 40 decks +10% synergy
Compulsive Research
10% of 40 decks +9% synergy
Quasiduplicate
10% of 40 decks +9% synergy
Wheel of Fortune
10% of 40 decks +1% synergy
Damnation
10% of 40 decks -1% synergy
Wheel of Misfortune
8% of 39 decks +2% synergy
Pieces of the Puzzle
8% of 40 decks +7% synergy
Massacre
8% of 40 decks +7% synergy
Pyroclasm
8% of 40 decks +7% synergy
Chart a Course
8% of 40 decks +4% synergy
Reforge the Soul
8% of 40 decks +2% synergy
Diabolic Tutor
8% of 40 decks +2% synergy
Utility Artifacts
Thousand-Year Elixir
50% of 40 decks +49% synergy
Swiftfoot Boots
32% of 40 decks +6% synergy
Conjurer's Closet
30% of 40 decks +26% synergy
Lightning Greaves
30% of 40 decks +0% synergy
The One Ring
28% of 18 decks +13% synergy
Mirage Mirror
22% of 40 decks +21% synergy
Rings of Brighthearth
18% of 40 decks +16% synergy
Heartstone
15% of 40 decks +15% synergy
Illusionist's Bracers
15% of 40 decks +14% synergy
Encroaching Mycosynth
13% of 23 decks +12% synergy
Battlemage's Bracers
10% of 39 decks +10% synergy
Lithoform Engine
10% of 39 decks +6% synergy
Magistrate's Scepter
10% of 40 decks +10% synergy
Cauldron of Souls
10% of 40 decks +10% synergy
Crystal Shard
10% of 40 decks +9% synergy
Phyrexian Altar
10% of 40 decks +6% synergy
Sensei's Divining Top
8% of 40 decks +3% synergy
Panharmonicon
8% of 40 decks +1% synergy
Wayfarer's Bauble
8% of 40 decks -11% synergy
Enchantments
Rising of the Day
40% of 15 decks +35% synergy
Training Grounds
28% of 40 decks +27% synergy
Rhystic Study
28% of 40 decks +0% synergy
Mystic Remora
25% of 40 decks +9% synergy
Candlekeep Sage
18% of 34 decks +17% synergy
Sneak Attack
8% of 40 decks +1% synergy
Propaganda
8% of 40 decks -4% synergy
Planeswalkers
Ashiok, Dream Render
18% of 40 decks +15% synergy
Vraska, Betrayal's Sting
17% of 23 decks +16% synergy
Narset, Parter of Veils
15% of 40 decks +10% synergy
Jace, Wielder of Mysteries
12% of 40 decks +11% synergy
Nicol Bolas, Dragon-God
8% of 40 decks +3% synergy
Utility Lands
Riptide Laboratory
45% of 40 decks +41% synergy
Command Beacon
30% of 40 decks +25% synergy
Bojuka Bog
25% of 40 decks -1% synergy
Sanctum of Eternity
20% of 40 decks +20% synergy
Desolate Lighthouse
18% of 40 decks +11% synergy
Minamo, School at Water's Edge
15% of 40 decks +12% synergy
Geier Reach Sanitarium
12% of 40 decks +5% synergy
Reliquary Tower
12% of 40 decks -22% synergy
Otawara, Soaring City
11% of 36 decks -4% synergy
Flamekin Village
10% of 40 decks +10% synergy
Temple of the False God
10% of 40 decks +0% synergy
Urborg, Tomb of Yawgmoth
10% of 40 decks -6% synergy
Hall of the Bandit Lord
8% of 40 decks +7% synergy
Ancient Tomb
8% of 40 decks -6% synergy
Mana Artifacts
Sol Ring
95% of 40 decks +4% synergy
Arcane Signet
85% of 40 decks -3% synergy
Izzet Signet
55% of 40 decks +14% synergy
Dimir Signet
55% of 40 decks +10% synergy
Rakdos Signet
48% of 40 decks +4% synergy
Talisman of Creativity
48% of 40 decks +3% synergy
Fellwar Stone
45% of 40 decks +9% synergy
Relic of Sauron
42% of 12 decks +14% synergy
Talisman of Dominance
40% of 40 decks -7% synergy
Basalt Monolith
35% of 40 decks +32% synergy
Talisman of Indulgence
32% of 40 decks -7% synergy
Coveted Jewel
25% of 40 decks +24% synergy
Commander's Sphere
20% of 40 decks -7% synergy
Mind Stone
15% of 40 decks -2% synergy
Patriar's Seal
15% of 34 decks +14% synergy
Ventifact Bottle
10% of 40 decks +10% synergy
Thran Dynamo
10% of 40 decks +4% synergy
Mana Crypt
10% of 40 decks -3% synergy
Chromatic Lantern
10% of 40 decks -8% synergy
Chromatic Orrery
8% of 39 decks +7% synergy
Jeweled Lotus
8% of 39 decks +0% synergy
Skull of Ramos
8% of 40 decks +7% synergy
Prismatic Geoscope
8% of 40 decks +7% synergy
Mana Vault
8% of 40 decks -1% synergy
Thought Vessel
8% of 40 decks -11% synergy
Lands
Command Tower
90% of 40 decks -2% synergy
Exotic Orchard
72% of 40 decks +15% synergy
Crumbling Necropolis
52% of 40 decks -6% synergy
Xander's Lounge
47% of 36 decks +3% synergy
Smoldering Marsh
42% of 40 decks +4% synergy
Steam Vents
40% of 40 decks -4% synergy
Bloodstained Mire
38% of 40 decks +7% synergy
Sunken Hollow
38% of 40 decks -4% synergy
Blood Crypt
38% of 40 decks -7% synergy
Watery Grave
38% of 40 decks -8% synergy
Evolving Wilds
35% of 40 decks +7% synergy
Shivan Reef
35% of 40 decks +7% synergy
Polluted Delta
35% of 40 decks +5% synergy
Scalding Tarn
35% of 40 decks +4% synergy
Terramorphic Expanse
30% of 40 decks +6% synergy
Morphic Pool
30% of 40 decks -5% synergy
Luxury Suite
28% of 40 decks -7% synergy
Training Center
26% of 39 decks -10% synergy
Maestros Theater
25% of 36 decks +10% synergy
Sulfurous Springs
25% of 40 decks +1% synergy
Underground River
25% of 40 decks +1% synergy
Dragonskull Summit
25% of 40 decks -16% synergy
Flooded Strand
22% of 40 decks +13% synergy
Misty Rainforest
22% of 40 decks +13% synergy
Marsh Flats
22% of 40 decks +12% synergy
Izzet Boilerworks
22% of 40 decks +7% synergy
Dimir Aqueduct
22% of 40 decks +7% synergy
Drowned Catacomb
22% of 40 decks -16% synergy
Sulfur Falls
22% of 40 decks -19% synergy
Verdant Catacombs
20% of 40 decks +10% synergy
City of Brass
20% of 40 decks +6% synergy
Underground Sea
20% of 40 decks +6% synergy
Temple of Malice
20% of 40 decks +6% synergy
Rakdos Carnarium
20% of 40 decks +5% synergy
Temple of Deceit
20% of 40 decks +4% synergy
Temple of Epiphany
20% of 40 decks +2% synergy
Mana Confluence
18% of 40 decks +5% synergy
Volcanic Island
18% of 40 decks +4% synergy
Badlands
18% of 40 decks +3% synergy
Prismatic Vista
15% of 40 decks +11% synergy
Dismal Backwater
15% of 40 decks +8% synergy
Swiftwater Cliffs
15% of 40 decks +8% synergy
Wooded Foothills
15% of 40 decks +7% synergy
Arid Mesa
15% of 40 decks +5% synergy
Darkwater Catacombs
15% of 40 decks +2% synergy
Path of Ancestry
15% of 40 decks -17% synergy
River of Tears
12% of 40 decks +10% synergy
Ash Barrens
12% of 40 decks +7% synergy
Plaza of Heroes
10% of 29 decks +8% synergy
Geothermal Bog
10% of 29 decks +8% synergy