Agatha's Soul Cauldron + Walking Ballista + Butcher Ghoul

Agatha's Soul Cauldron
Walking Ballista
Butcher Ghoul

Requires
Agatha's Soul Cauldron must be on the battlefield. Walking Ballista must be in exile (exiled by Agatha's Soul Cauldron). Butcher Ghoul must be on the battlefield. Butcher Ghoul has at least one +1/+1 counter on it.
Steps
  1. Activate Butcher Ghoul using Walking Ballista's second ability by removing a +1/+1 counter from it.
  2. Repeat step 1 until Butcher Ghoul has no +1/+1 counters on it.
  3. Resolve all Butcher Ghoul abilities dealing 1 damage to Butcher Ghoul, and any remaining damage to any target(s).
  4. Butcher Ghoul dies as a state-based action due to having 0 toughness.
  5. Butcher Ghoul's undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  6. Repeat.
Results
Infinite death triggers. Infinite ETB. Infinite LTB.

Yawgmoth, Thran Physician
0.23% of 5567 decks 13 decks
Tayam, Luminous Enigma
0.12% of 5725 decks 7 decks
Meren of Clan Nel Toth
0.01% of 14905 decks 2 decks
Grist, the Hunger Tide
0.04% of 5655 decks 2 decks
Hancock, Ghoulish Mayor
1.21% of 165 decks 2 decks
Hapatra, Vizier of Poisons
0.04% of 4813 decks 2 decks
Massacre Girl, Known Killer
0.05% of 3946 decks 2 decks
Vraska, the Silencer
0.07% of 1455 decks 1 decks
Grenzo, Dungeon Warden
0.03% of 3267 decks 1 decks
Volo, Itinerant Scholar // Agent of the Iron Throne
3.03% of 33 decks 1 decks
Fain, the Broker
0.36% of 279 decks 1 decks
Francisco, Fowl Marauder // Kodama of the East Tree
33.33% of 3 decks 1 decks
The Master, Formed Anew
0.23% of 438 decks 1 decks
Syr Konrad, the Grim
0.02% of 4587 decks 1 decks
Kenrith, the Returned King
0.00% of 21513 decks 1 decks
Mikaeus, the Unhallowed
0.07% of 1337 decks 1 decks
Teysa Karlov
0.01% of 15216 decks 1 decks
Sek'Kuar, Deathkeeper
0.08% of 1324 decks 1 decks
High Synergy Cards
Young Wolf
92% of 24 decks +91% synergy
Fierce Guardianship
100% of 7 decks +82% synergy
Strangleroot Geist
75% of 24 decks +75% synergy
Swan Song
86% of 7 decks +69% synergy
Mystic Remora
86% of 7 decks +68% synergy
Mindbreak Trap
71% of 7 decks +67% synergy
Deflecting Swat
80% of 5 decks +64% synergy
Birds of Paradise
88% of 24 decks +61% synergy
Ranger-Captain of Eos
64% of 14 decks +60% synergy
Zulaport Cutthroat
69% of 55 decks +59% synergy
Top Cards
Mystical Tutor
71% of 7 decks +56% synergy
Rhystic Study
71% of 7 decks +44% synergy
Dark Ritual
69% of 55 decks +47% synergy
Blood Artist
65% of 55 decks +54% synergy
Entomb
64% of 55 decks +56% synergy
Deathrite Shaman
62% of 24 decks +50% synergy
Worldly Tutor
62% of 24 decks +48% synergy
Delighted Halfling
62% of 24 decks +48% synergy
Orcish Bowmasters
62% of 55 decks +51% synergy
Reanimate
62% of 55 decks +46% synergy
Creatures
Ignoble Hierarch
100% of 3 decks +74% synergy
Dockside Extortionist
60% of 5 decks +47% synergy
Avacyn's Pilgrim
60% of 10 decks +45% synergy
Devoted Druid
58% of 24 decks +55% synergy
Geralf's Messenger
58% of 55 decks +58% synergy
Thassa's Oracle
57% of 7 decks +50% synergy
Esper Sentinel
57% of 14 decks +36% synergy
Wall of Roots
50% of 24 decks +49% synergy
Eternal Witness
50% of 24 decks +29% synergy
Mikaeus, the Unhallowed
49% of 55 decks +46% synergy
Warren Soultrader
46% of 24 decks +38% synergy
Elves of Deep Shadow
46% of 24 decks +35% synergy
Llanowar Elves
46% of 24 decks +25% synergy
Yawgmoth, Thran Physician
45% of 55 decks +42% synergy
Heliod, Sun-Crowned
43% of 14 decks +40% synergy
Aven Interrupter
43% of 7 decks +39% synergy
Faerie Mastermind
43% of 7 decks +36% synergy
Wight of the Reliquary
43% of 7 decks +34% synergy
Kutzil, Malamet Exemplar
43% of 7 decks +23% synergy
Haywire Mite
42% of 24 decks +38% synergy
Bartolomé del Presidio
42% of 12 decks +35% synergy
Opposition Agent
40% of 55 decks +33% synergy
Dauthi Voidwalker
40% of 55 decks +32% synergy
Grand Abolisher
36% of 14 decks +27% synergy
Carrion Feeder
31% of 55 decks +26% synergy
Sheoldred, the Apocalypse
31% of 55 decks +25% synergy
Safehold Elite
30% of 10 decks +30% synergy
Kitchen Finks
30% of 10 decks +30% synergy
Endurance
29% of 24 decks +27% synergy
Elvish Mystic
29% of 24 decks +11% synergy
Pawn of Ulamog
29% of 55 decks +27% synergy
Gravecrawler
29% of 55 decks +26% synergy
Archivist of Oghma
29% of 14 decks +22% synergy
Drannith Magistrate
29% of 14 decks +22% synergy
Pitiless Plunderer
27% of 55 decks +20% synergy
Gray Merchant of Asphodel
25% of 55 decks +16% synergy
Viscera Seer
25% of 55 decks +16% synergy
Hapatra, Vizier of Poisons
25% of 24 decks +25% synergy
Protean Hulk
25% of 24 decks +23% synergy
Collector Ouphe
25% of 24 decks +22% synergy
Sylvan Safekeeper
25% of 24 decks +22% synergy
Hancock, Ghoulish Mayor
24% of 33 decks +24% synergy
Forsaken Miner
24% of 29 decks +23% synergy
Ophiomancer
24% of 55 decks +21% synergy
Icatian Moneychanger
21% of 14 decks +21% synergy
Vizier of Remedies
21% of 14 decks +21% synergy
White Plume Adventurer
21% of 14 decks +20% synergy
Luminous Broodmoth
21% of 14 decks +19% synergy
Archon of Emeria
21% of 14 decks +19% synergy
Recruiter of the Guard
21% of 14 decks +18% synergy
Instants
Vampiric Tutor
67% of 55 decks +49% synergy
Chord of Calling
58% of 24 decks +53% synergy
Mental Misstep
57% of 7 decks +51% synergy
Flusterstorm
57% of 7 decks +50% synergy
Pact of Negation
57% of 7 decks +50% synergy
Force of Will
57% of 7 decks +46% synergy
Enlightened Tutor
57% of 14 decks +39% synergy
An Offer You Can't Refuse
57% of 7 decks +37% synergy
Cyclonic Rift
57% of 7 decks +29% synergy
Assassin's Trophy
54% of 24 decks +24% synergy
Culling the Weak
53% of 55 decks +49% synergy
Abrupt Decay
50% of 24 decks +39% synergy
Revitalizing Repast
50% of 6 decks +37% synergy
Borne Upon a Wind
43% of 7 decks +39% synergy
Force of Negation
43% of 7 decks +34% synergy
Swords to Plowshares
43% of 14 decks -20% synergy
Cabal Ritual
42% of 55 decks +37% synergy
Eladamri's Call
40% of 10 decks +29% synergy
Silence
36% of 14 decks +29% synergy
Deadly Rollick
35% of 55 decks +24% synergy
Force of Vigor
29% of 24 decks +26% synergy
Veil of Summer
25% of 24 decks +19% synergy
Archdruid's Charm
25% of 12 decks +18% synergy
Legolas's Quick Reflexes
21% of 19 decks +18% synergy
Noxious Revival
21% of 24 decks +15% synergy
Heroic Intervention
21% of 24 decks -9% synergy
Crop Rotation
17% of 24 decks +7% synergy
Songs of the Damned
16% of 55 decks +15% synergy
Flare of Malice
16% of 25 decks +13% synergy
Dismember
15% of 55 decks +12% synergy
Sacrifice
13% of 55 decks +12% synergy
Snuff Out
13% of 55 decks +10% synergy
Imp's Mischief
13% of 55 decks +10% synergy
Malakir Rebirth
13% of 55 decks +4% synergy
Fell the Profane
12% of 24 decks +1% synergy
Fatal Push
11% of 55 decks +10% synergy
Saw in Half
11% of 55 decks +8% synergy
Ad Nauseam
11% of 55 decks +8% synergy
Defile
11% of 55 decks +7% synergy
Rain of Filth
9% of 55 decks +8% synergy
Demonic Consultation
9% of 55 decks +5% synergy
Tainted Pact
9% of 55 decks +5% synergy
Deadly Dispute
9% of 55 decks -2% synergy
Mausoleum Secrets
7% of 55 decks +7% synergy
Cut Down
7% of 55 decks +6% synergy
Force of Despair
7% of 55 decks +6% synergy
Sudden Spoiling
7% of 55 decks +5% synergy
Go for the Throat
7% of 55 decks +0% synergy
Infernal Grasp
7% of 55 decks -0% synergy
Village Rites
7% of 55 decks -3% synergy
Sorceries
Demonic Tutor
71% of 55 decks +49% synergy
Gamble
60% of 5 decks +50% synergy
Diabolic Intent
53% of 55 decks +44% synergy
Imperial Seal
45% of 55 decks +40% synergy
Toxic Deluge
44% of 55 decks +26% synergy
Windfall
43% of 7 decks +30% synergy
Eldritch Evolution
42% of 24 decks +37% synergy
Green Sun's Zenith
38% of 24 decks +31% synergy
Finale of Devastation
33% of 24 decks +25% synergy
Beseech the Mirror
31% of 55 decks +27% synergy
Sevinne's Reclamation
29% of 14 decks +21% synergy
Buried Alive
27% of 55 decks +22% synergy
Unmarked Grave
25% of 55 decks +23% synergy
Agadeem's Awakening
25% of 55 decks +22% synergy
Lively Dirge
24% of 29 decks +22% synergy
Idyllic Tutor
21% of 14 decks +16% synergy
Culling Ritual
21% of 24 decks +10% synergy
Unearth
20% of 55 decks +17% synergy
Grim Tutor
18% of 55 decks +14% synergy
Victimize
18% of 55 decks +7% synergy
Feed the Swarm
18% of 55 decks -0% synergy
Three Visits
17% of 24 decks -8% synergy
Final Parting
13% of 55 decks +11% synergy
Damnation
11% of 55 decks +3% synergy
Praetor's Grasp
9% of 55 decks +7% synergy
Infectious Inquiry
9% of 55 decks +7% synergy
Peer into the Abyss
9% of 55 decks +6% synergy
Dread Return
9% of 55 decks +4% synergy
Chain of Smog
7% of 55 decks +6% synergy
Yawgmoth's Will
7% of 55 decks +6% synergy
Living Death
7% of 55 decks +2% synergy
Sign in Blood
7% of 55 decks -2% synergy
Thoughtseize
5% of 55 decks +5% synergy
Bubbling Muck
5% of 55 decks +4% synergy
Phyresis Outbreak
5% of 55 decks +4% synergy
Mutilate
5% of 55 decks +3% synergy
Profane Tutor
5% of 55 decks +3% synergy
Torment of Hailfire
5% of 55 decks +0% synergy
Night's Whisper
5% of 55 decks -4% synergy
Utility Artifacts
Phyrexian Altar
51% of 55 decks +47% synergy
Ashnod's Altar
38% of 55 decks +31% synergy
The One Ring
36% of 55 decks +27% synergy
Birthing Pod
33% of 24 decks +31% synergy
Jet Medallion
29% of 55 decks +26% synergy
Wishclaw Talisman
27% of 55 decks +22% synergy
Skullclamp
27% of 55 decks +15% synergy
Sensei's Divining Top
22% of 55 decks +16% synergy
Bolas's Citadel
20% of 55 decks +11% synergy
The Great Henge
17% of 24 decks +7% synergy
Vexing Bauble
14% of 22 decks +12% synergy
Altar of Dementia
13% of 55 decks +10% synergy
Aetherflux Reservoir
13% of 55 decks +9% synergy
Genesis Chamber
11% of 55 decks +10% synergy
Lightning Greaves
11% of 55 decks -15% synergy
Thousand-Year Elixir
9% of 55 decks +7% synergy
Clown Car
7% of 55 decks +7% synergy
Defense Grid
7% of 55 decks +6% synergy
The Ozolith
7% of 55 decks +4% synergy
Blasting Station
5% of 55 decks +5% synergy
Mesmeric Orb
5% of 55 decks +4% synergy
Elixir of Immortality
5% of 55 decks +4% synergy
Expedition Map
5% of 55 decks +2% synergy
Swiftfoot Boots
5% of 55 decks -22% synergy
Enchantments
Insidious Roots
50% of 12 decks +41% synergy
Sylvan Library
38% of 24 decks +26% synergy
The Meathook Massacre
35% of 55 decks +29% synergy
Animate Dead
33% of 55 decks +23% synergy
Nest of Scarabs
31% of 55 decks +30% synergy
Survival of the Fittest
29% of 24 decks +27% synergy
Touch the Spirit Realm
29% of 14 decks +27% synergy
Smothering Tithe
29% of 14 decks +4% synergy
Necromancy
22% of 55 decks +19% synergy
Deafening Silence
21% of 14 decks +19% synergy
Blind Obedience
21% of 14 decks +15% synergy
Necropotence
20% of 55 decks +15% synergy
Bastion of Remembrance
20% of 55 decks +14% synergy
Black Market Connections
16% of 55 decks +5% synergy
Chthonian Nightmare
16% of 25 decks +13% synergy
Bridge from Below
13% of 55 decks +13% synergy
Blight Mound
13% of 55 decks +12% synergy
Grave Pact
13% of 55 decks +8% synergy
Carpet of Flowers
12% of 24 decks +9% synergy
Utopia Sprawl
12% of 24 decks +5% synergy
Wild Growth
12% of 24 decks +1% synergy
Carnival of Souls
11% of 55 decks +11% synergy
Bloodchief Ascension
9% of 55 decks +6% synergy
Dictate of Erebos
9% of 55 decks +5% synergy
Phyrexian Arena
9% of 55 decks -6% synergy
Case of the Stashed Skeleton
8% of 38 decks +7% synergy
Retribution of the Ancients
7% of 55 decks +7% synergy
Dance of the Dead
7% of 55 decks +6% synergy
Dreadhorde Invasion
7% of 55 decks +5% synergy
Bitterblossom
7% of 55 decks +3% synergy
Contamination
5% of 55 decks +5% synergy
Blowfly Infestation
5% of 55 decks +5% synergy
Black Market
5% of 55 decks +1% synergy
Planeswalkers
Grist, the Hunger Tide
46% of 24 decks +42% synergy
Tyvar, Jubilant Brawler
38% of 24 decks +33% synergy
Karn, the Great Creator
5% of 55 decks +4% synergy
Utility Lands
Otawara, Soaring City
71% of 7 decks +55% synergy
Ancient Tomb
69% of 55 decks +59% synergy
Boseiju, Who Endures
67% of 24 decks +47% synergy
Phyrexian Tower
62% of 55 decks +53% synergy
Urborg, Tomb of Yawgmoth
51% of 55 decks +41% synergy
Shifting Woodland
50% of 6 decks +40% synergy
Urza's Saga
44% of 55 decks +36% synergy
Minamo, School at Water's Edge
43% of 7 decks +39% synergy
Gaea's Cradle
42% of 24 decks +36% synergy
Takenuma, Abandoned Mire
36% of 55 decks +26% synergy
Gavony Township
30% of 10 decks +20% synergy
Nykthos, Shrine to Nyx
29% of 55 decks +23% synergy
Cabal Coffers
27% of 55 decks +16% synergy
Dryad Arbor
25% of 24 decks +21% synergy
Yavimaya, Cradle of Growth
24% of 55 decks +14% synergy
Lake of the Dead
22% of 55 decks +21% synergy
Bojuka Bog
22% of 55 decks -9% synergy
Spymaster's Vault
21% of 24 decks +17% synergy
Emergence Zone
18% of 55 decks +16% synergy
Centaur Garden
17% of 24 decks +16% synergy
Command Beacon
16% of 55 decks +12% synergy
Blast Zone
13% of 55 decks +11% synergy
Field of the Dead
13% of 55 decks +9% synergy
Homeward Path
11% of 55 decks +9% synergy
Volrath's Stronghold
9% of 55 decks +8% synergy
Barad-dûr
9% of 55 decks +6% synergy
Castle Locthwain
9% of 55 decks +4% synergy
Cabal Stronghold
7% of 55 decks +4% synergy
Peat Bog
5% of 55 decks +5% synergy
Inkmoth Nexus
5% of 55 decks +5% synergy
City of Traitors
5% of 55 decks +5% synergy
Crystal Vein
5% of 55 decks +4% synergy
Dakmor Salvage
5% of 55 decks +4% synergy
Geier Reach Sanitarium
5% of 55 decks +2% synergy
Mortuary Mire
5% of 55 decks +0% synergy
Karn's Bastion
5% of 55 decks +0% synergy
Buried Ruin
5% of 55 decks +0% synergy
War Room
5% of 55 decks -1% synergy
Reliquary Tower
5% of 55 decks -24% synergy
Mana Artifacts
Sol Ring
96% of 55 decks +12% synergy
Arcane Signet
67% of 55 decks -5% synergy
Chrome Mox
49% of 55 decks +43% synergy
Mox Diamond
45% of 55 decks +41% synergy
Talisman of Dominance
43% of 7 decks +12% synergy
Mana Vault
42% of 55 decks +35% synergy
Mana Crypt
42% of 55 decks +33% synergy
Lotus Petal
40% of 55 decks +33% synergy
Jeweled Lotus
35% of 55 decks +28% synergy
Talisman of Resilience
29% of 24 decks +18% synergy
Mox Amber
29% of 55 decks +25% synergy
Mox Opal
29% of 55 decks +25% synergy
Talisman of Hierarchy
29% of 14 decks +4% synergy
Fellwar Stone
25% of 55 decks +4% synergy
Springleaf Drum
16% of 55 decks +14% synergy
Golgari Signet
12% of 24 decks -0% synergy
Lion's Eye Diamond
11% of 55 decks +9% synergy
Grim Monolith
5% of 55 decks +3% synergy
Thought Vessel
5% of 55 decks -11% synergy
Lands
Blood Crypt
100% of 5 decks +61% synergy
Watery Grave
100% of 7 decks +59% synergy
Stomping Ground
100% of 3 decks +59% synergy
Overgrown Tomb
92% of 24 decks +49% synergy
Temple Garden
90% of 10 decks +49% synergy
Underground Sea
86% of 7 decks +72% synergy
Godless Shrine
86% of 14 decks +45% synergy
Hallowed Fountain
75% of 4 decks +34% synergy
Undergrowth Stadium
71% of 24 decks +45% synergy
Llanowar Wastes
67% of 24 decks +41% synergy
Scrubland
64% of 14 decks +51% synergy
Bayou
62% of 24 decks +49% synergy
Savannah
60% of 10 decks +47% synergy
Undercity Sewers
60% of 5 decks +46% synergy
Morphic Pool
57% of 7 decks +31% synergy
Command Tower
55% of 55 decks -19% synergy
Nurturing Peatland
54% of 24 decks +48% synergy
Underground Mortuary
54% of 13 decks +37% synergy
Indatha Triome
50% of 10 decks +19% synergy
Verdant Catacombs
49% of 55 decks +38% synergy
Gemstone Caverns
45% of 55 decks +41% synergy
Marsh Flats
44% of 55 decks +32% synergy
Underground River
43% of 7 decks +23% synergy
Vault of Champions
43% of 14 decks +17% synergy
Bloodstained Mire
42% of 55 decks +31% synergy
Horizon Canopy
40% of 10 decks +35% synergy
Polluted Delta
40% of 55 decks +29% synergy
Bountiful Promenade
40% of 10 decks +16% synergy
Talon Gates of Madara
38% of 21 decks +34% synergy
Cavern of Souls
36% of 55 decks +30% synergy
Shadowy Backstreet
30% of 10 decks +17% synergy
Brushland
30% of 10 decks +14% synergy
Darkbore Pathway
29% of 24 decks +20% synergy
Woodland Cemetery
29% of 24 decks +2% synergy
Silent Clearing
29% of 14 decks +24% synergy
Caves of Koilos
29% of 14 decks +0% synergy
City of Brass
27% of 55 decks +19% synergy
Windswept Heath
27% of 55 decks +17% synergy
Exotic Orchard
27% of 55 decks -8% synergy
Misty Rainforest
25% of 55 decks +14% synergy
Blooming Marsh
25% of 24 decks +21% synergy
Deathcap Glade
25% of 24 decks +11% synergy
Mana Confluence
24% of 55 decks +16% synergy
Shattered Sanctum
21% of 14 decks +8% synergy
Twilight Mire
21% of 24 decks +11% synergy
Wooded Foothills
20% of 55 decks +10% synergy
Flooded Strand
18% of 55 decks +8% synergy
Forbidden Orchard
13% of 55 decks +10% synergy
Prismatic Vista
13% of 55 decks +7% synergy
Arid Mesa
13% of 55 decks +2% synergy