Archghoul of Thraben + Mortuary + Shambling Ghast + Carrion Feeder

Archghoul of Thraben
Mortuary
Shambling Ghast
Carrion Feeder

Requires
Archghoul of Thraben must be on the battlefield. Mortuary must be on the battlefield. Shambling Ghast must be on the battlefield. Carrion Feeder must be on the battlefield.
Steps
  1. Activate Carrion Feeder by sacrificing Shambling Ghast.
  2. When Shambling Ghast dies, it, Mortuary and Archghoul of Thraben trigger.
  3. Resolve the Mortuary trigger, putting Shambling Ghast on top of your library.
  4. Resolve the Shambling Ghast trigger, creating a Treasure artifact token.
  5. Resolve the Archghoul of Thraben trigger, revealing Shambling Ghast from the top of your library and putting it into your hand.
  6. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it.
  7. Activate the Treasure by tapping and sacrificing it, adding .
  8. Cast Shambling Ghast by paying .
  9. Repeat.
Results
Infinite +1/+1 counters on Carrion Feeder. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite storm count.

Wilhelt, the Rotcleaver
0.02% of 18970 decks 3 decks
Muldrotha, the Gravetide
0.01% of 15112 decks 2 decks
Varina, Lich Queen
0.03% of 7044 decks 2 decks
Zur the Enchanter
0.02% of 11095 decks 2 decks
Grimgrin, Corpse-Born
0.05% of 2083 decks 1 decks
Elas il-Kor, Sadistic Pilgrim
0.02% of 6454 decks 1 decks
High Synergy Cards
Gravecrawler
100% of 11 decks +97% synergy
Phyrexian Altar
100% of 11 decks +96% synergy
Liliana, Untouched by Death
91% of 11 decks +90% synergy
Rooftop Storm
80% of 10 decks +78% synergy
Sidisi, Undead Vizier
73% of 11 decks +71% synergy
Necroduality
70% of 10 decks +69% synergy
Diregraf Colossus
64% of 11 decks +62% synergy
Mikaeus, the Unhallowed
64% of 11 decks +61% synergy
Altar of Dementia
64% of 11 decks +61% synergy
Ashnod's Altar
64% of 11 decks +56% synergy
Top Cards
Undead Warchief
55% of 11 decks +53% synergy
Entomb
55% of 11 decks +47% synergy
Gray Merchant of Asphodel
55% of 11 decks +45% synergy
Bolas's Citadel
55% of 11 decks +45% synergy
Poppet Stitcher
50% of 10 decks +49% synergy
Diregraf Captain
50% of 10 decks +46% synergy
Rot Hulk
45% of 11 decks +45% synergy
Acererak the Archlich
45% of 11 decks +45% synergy
Headless Rider
45% of 11 decks +44% synergy
Undead Augur
45% of 11 decks +44% synergy
Creatures
Wayward Servant
60% of 5 decks +59% synergy
Luminous Broodmoth
60% of 5 decks +58% synergy
Wilhelt, the Rotcleaver
40% of 10 decks +38% synergy
Maggot Carrier
36% of 11 decks +36% synergy
Putrid Goblin
36% of 11 decks +36% synergy
Relentless Dead
36% of 11 decks +36% synergy
Noxious Ghoul
36% of 11 decks +35% synergy
Plague Belcher
36% of 11 decks +35% synergy
Lord of the Undead
36% of 11 decks +35% synergy
Champion of the Perished
36% of 11 decks +35% synergy
Midnight Reaper
36% of 11 decks +33% synergy
Havengul Lich
30% of 10 decks +28% synergy
Gisa and Geralf
30% of 10 decks +28% synergy
Tattered Mummy
27% of 11 decks +27% synergy
Butcher Ghoul
27% of 11 decks +27% synergy
Geralf's Messenger
27% of 11 decks +27% synergy
Vengeful Dead
27% of 11 decks +26% synergy
Tormod, the Desecrator
27% of 11 decks +26% synergy
Blood Pet
27% of 11 decks +26% synergy
Cryptbreaker
27% of 11 decks +26% synergy
Death Baron
27% of 11 decks +25% synergy
Stitcher's Supplier
27% of 11 decks +24% synergy
Viscera Seer
27% of 11 decks +18% synergy
Blood Artist
27% of 11 decks +16% synergy
Instants
Enlightened Tutor
60% of 5 decks +42% synergy
Swords to Plowshares
60% of 5 decks -3% synergy
Vampiric Tutor
55% of 11 decks +36% synergy
Dark Ritual
45% of 11 decks +23% synergy
Mana Drain
40% of 10 decks +25% synergy
Mystical Tutor
30% of 10 decks +15% synergy
Fierce Guardianship
30% of 10 decks +12% synergy
Counterspell
30% of 10 decks -13% synergy
Sorceries
Demonic Tutor
55% of 11 decks +32% synergy
Empty the Laboratory
30% of 10 decks +29% synergy
Diabolic Intent
27% of 11 decks +18% synergy
Reanimate
27% of 11 decks +12% synergy
Utility Artifacts
Aetherflux Reservoir
27% of 11 decks +23% synergy
Lightning Greaves
27% of 11 decks +2% synergy
Swiftfoot Boots
27% of 11 decks -1% synergy
Enchantments
Solemnity
60% of 5 decks +59% synergy
Grave Pact
45% of 11 decks +41% synergy
The Meathook Massacre
45% of 11 decks +40% synergy
Mystic Remora
30% of 10 decks +12% synergy
Rhystic Study
30% of 10 decks +2% synergy
Utility Lands
Reliquary Tower
55% of 11 decks +25% synergy
Field of the Dead
36% of 11 decks +33% synergy
Urborg, Tomb of Yawgmoth
36% of 11 decks +27% synergy
Unholy Grotto
27% of 11 decks +27% synergy
Takenuma, Abandoned Mire
27% of 11 decks +17% synergy
Mana Artifacts
Sol Ring
100% of 11 decks +16% synergy
Talisman of Hierarchy
80% of 5 decks +55% synergy
Talisman of Progress
75% of 4 decks +52% synergy
Arcane Signet
64% of 11 decks -8% synergy
Orzhov Signet
60% of 5 decks +33% synergy
Talisman of Dominance
40% of 10 decks +9% synergy
Mana Crypt
36% of 11 decks +27% synergy
Fellwar Stone
36% of 11 decks +15% synergy
Dimir Signet
30% of 10 decks +0% synergy
Lands
Sea of Clouds
75% of 4 decks +49% synergy
Raffine's Tower
75% of 4 decks +47% synergy
Hallowed Fountain
75% of 4 decks +34% synergy
Command Tower
73% of 11 decks -1% synergy
Concealed Courtyard
60% of 5 decks +54% synergy
Fetid Heath
60% of 5 decks +49% synergy
Godless Shrine
60% of 5 decks +19% synergy
Path of Ancestry
55% of 11 decks +33% synergy
Darkwater Catacombs
50% of 10 decks +35% synergy
Underground River
50% of 10 decks +31% synergy
Morphic Pool
50% of 10 decks +24% synergy
Watery Grave
50% of 10 decks +9% synergy
Marsh Flats
45% of 11 decks +34% synergy
Shipwreck Marsh
40% of 10 decks +21% synergy
Polluted Delta
36% of 11 decks +25% synergy
Clearwater Pathway
30% of 10 decks +20% synergy
Cavern of Souls
27% of 11 decks +20% synergy
Exotic Orchard
27% of 11 decks -8% synergy