Agatha's Soul Cauldron + Triskelion + Strangleroot Geist

Agatha's Soul Cauldron
Triskelion
Strangleroot Geist

Requires
Agatha's Soul Cauldron must be on the battlefield. Triskelion must be in exile (exiled by Agatha's Soul Cauldron). Strangleroot Geist must be on the battlefield. Strangleroot Geist has at least one +1/+1 counter on it.
Steps
  1. Activate Strangleroot Geist using Triskelion's ability by removing a +1/+1 counter from it.
  2. Repeat step 1 until Strangleroot Geist has no +1/+1 counters on it.
  3. Resolve all Strangleroot Geist abilities dealing 1 damage to Strangleroot Geist, and any remaining damage to any target(s).
  4. Strangleroot Geist dies as a state-based action due to having 0 toughness.
  5. Strangleroot Geist'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.

Ghave, Guru of Spores
0.03% of 6440 decks 2 decks
Lonis, Genetics Expert
0.32% of 632 decks 2 decks
Volrath, the Shapestealer
0.07% of 2856 decks 2 decks
Ziatora, the Incinerator
0.01% of 8061 decks 1 decks
Sarulf, Realm Eater
0.05% of 2154 decks 1 decks
Chatterfang, Squirrel General
0.01% of 16809 decks 1 decks
Grist, the Hunger Tide
0.02% of 5648 decks 1 decks
Rishkar, Peema Renegade
0.37% of 273 decks 1 decks
Agent Frank Horrigan
0.08% of 1248 decks 1 decks
Hapatra, Vizier of Poisons
0.02% of 4821 decks 1 decks
Reyhan, Last of the Abzan // Yoshimaru, Ever Faithful
0.06% of 1758 decks 1 decks
Sisay, Weatherlight Captain
0.01% of 12276 decks 1 decks
Tayam, Luminous Enigma
0.02% of 5866 decks 1 decks
Meren of Clan Nel Toth
0.01% of 15166 decks 1 decks
Indominus Rex, Alpha
0.02% of 4911 decks 1 decks
High Synergy Cards
Young Wolf
89% of 18 decks +88% synergy
Walking Ballista
83% of 18 decks +81% synergy
Yawgmoth, Thran Physician
67% of 15 decks +63% synergy
Mikaeus, the Unhallowed
60% of 15 decks +57% synergy
Devoted Druid
56% of 18 decks +53% synergy
Viscera Seer
60% of 15 decks +51% synergy
Fierce Guardianship
67% of 6 decks +49% synergy
Ashnod's Altar
50% of 18 decks +42% synergy
Eldritch Evolution
44% of 18 decks +40% synergy
Geralf's Messenger
40% of 15 decks +40% synergy
Top Cards
Swords to Plowshares
80% of 5 decks +17% synergy
Birds of Paradise
61% of 18 decks +34% synergy
Zulaport Cutthroat
47% of 15 decks +37% synergy
Chord of Calling
44% of 18 decks +39% synergy
Grist, the Hunger Tide
40% of 15 decks +36% synergy
Carrion Feeder
40% of 15 decks +35% synergy
Diabolic Intent
40% of 15 decks +31% synergy
Blood Artist
40% of 15 decks +28% synergy
Altar of Dementia
39% of 18 decks +36% synergy
Worldly Tutor
39% of 18 decks +25% synergy
Creatures
Heliod, Sun-Crowned
60% of 5 decks +57% synergy
Ranger-Captain of Eos
60% of 5 decks +55% synergy
Warren Soultrader
60% of 5 decks +53% synergy
Marionette Apprentice
60% of 5 decks +53% synergy
Faeburrow Elder
60% of 5 decks +49% synergy
Tribute Mage
50% of 6 decks +48% synergy
Urza, Lord High Artificer
50% of 6 decks +47% synergy
Kinnan, Bonder Prodigy
50% of 6 decks +46% synergy
Evolution Witness
50% of 6 decks +45% synergy
Phyrexian Metamorph
50% of 6 decks +43% synergy
Eternal Witness
39% of 18 decks +18% synergy
Llanowar Elves
39% of 18 decks +18% synergy
Hapatra, Vizier of Poisons
33% of 15 decks +33% synergy
Vein Ripper
33% of 9 decks +31% synergy
Incubation Druid
33% of 18 decks +28% synergy
Elves of Deep Shadow
33% of 15 decks +22% synergy
Orcish Bowmasters
33% of 15 decks +22% synergy
Francisco, Fowl Marauder
27% of 11 decks +27% synergy
Butcher Ghoul
27% of 15 decks +26% synergy
Fiend Artisan
27% of 15 decks +24% synergy
Deathrite Shaman
27% of 15 decks +15% synergy
Wall of Roots
22% of 18 decks +21% synergy
Protean Hulk
22% of 18 decks +20% synergy
Renata, Called to the Hunt
22% of 18 decks +20% synergy
Champion of Lambholt
22% of 18 decks +15% synergy
Kami of Whispered Hopes
22% of 18 decks +15% synergy
Bloom Tender
22% of 18 decks +14% synergy
Delighted Halfling
22% of 18 decks +8% synergy
Dina, Soul Steeper
20% of 15 decks +17% synergy
Gravecrawler
20% of 15 decks +17% synergy
Yahenni, Undying Partisan
20% of 15 decks +17% synergy
Mazirek, Kraul Death Priest
20% of 15 decks +17% synergy
Chatterfang, Squirrel General
20% of 15 decks +15% synergy
Pitiless Plunderer
20% of 15 decks +12% synergy
Experiment One
17% of 18 decks +16% synergy
Herd Baloth
17% of 18 decks +16% synergy
Karametra's Acolyte
17% of 18 decks +15% synergy
Haywire Mite
17% of 18 decks +13% synergy
Jaheira, Friend of the Forest
17% of 18 decks +11% synergy
Fyndhorn Elves
17% of 18 decks +4% synergy
Instants
Enlightened Tutor
60% of 5 decks +42% synergy
Mana Drain
50% of 6 decks +35% synergy
Cyclonic Rift
50% of 6 decks +22% synergy
Vampiric Tutor
47% of 15 decks +28% synergy
Entomb
33% of 15 decks +26% synergy
Dark Ritual
27% of 15 decks +4% synergy
Deadly Rollick
20% of 15 decks +9% synergy
Deadly Dispute
20% of 15 decks +9% synergy
Assassin's Trophy
20% of 15 decks -10% synergy
Beast Within
17% of 18 decks -22% synergy
Sorceries
Neoform
50% of 6 decks +45% synergy
Fabricate
50% of 6 decks +44% synergy
Demonic Tutor
47% of 15 decks +24% synergy
Reanimate
33% of 15 decks +18% synergy
Damnation
27% of 15 decks +19% synergy
Culling Ritual
27% of 15 decks +16% synergy
Green Sun's Zenith
22% of 18 decks +16% synergy
Life // Death
20% of 15 decks +18% synergy
Buried Alive
20% of 15 decks +14% synergy
Toxic Deluge
20% of 15 decks +3% synergy
Finale of Devastation
17% of 18 decks +8% synergy
Kodama's Reach
17% of 18 decks -15% synergy
Rampant Growth
17% of 18 decks -18% synergy
Utility Artifacts
Phyrexian Altar
28% of 18 decks +24% synergy
Skullclamp
28% of 18 decks +15% synergy
Tarrian's Soulcleaver
27% of 15 decks +25% synergy
The One Ring
22% of 18 decks +13% synergy
Lightning Greaves
22% of 18 decks -3% synergy
Birthing Pod
17% of 18 decks +14% synergy
The Ozolith
17% of 18 decks +13% synergy
The Great Henge
17% of 18 decks +7% synergy
Enchantments
Mystic Remora
50% of 6 decks +32% synergy
Insidious Roots
38% of 8 decks +29% synergy
Nest of Scarabs
20% of 15 decks +19% synergy
Bastion of Remembrance
20% of 15 decks +14% synergy
Phyrexian Arena
20% of 15 decks +5% synergy
Flourishing Defenses
17% of 18 decks +17% synergy
Hardened Scales
17% of 18 decks +8% synergy
Doubling Season
17% of 18 decks +8% synergy
Sylvan Library
17% of 18 decks +5% synergy
Planeswalkers
Tyvar, Jubilant Brawler
20% of 15 decks +15% synergy
Utility Lands
Boseiju, Who Endures
39% of 18 decks +19% synergy
Nesting Grounds
22% of 18 decks +21% synergy
Yavimaya, Cradle of Growth
22% of 18 decks +13% synergy
Phyrexian Tower
20% of 15 decks +11% synergy
Bojuka Bog
20% of 15 decks -10% synergy
Dryad Arbor
17% of 18 decks +12% synergy
Urza's Saga
17% of 18 decks +10% synergy
Ancient Tomb
17% of 18 decks +6% synergy
Mana Artifacts
Arcane Signet
89% of 18 decks +17% synergy
Sol Ring
83% of 18 decks -1% synergy
Fellwar Stone
28% of 18 decks +7% synergy
Talisman of Resilience
20% of 15 decks +8% synergy
Golgari Signet
20% of 15 decks +7% synergy
Lands
Temple Garden
100% of 5 decks +60% synergy
Breeding Pool
83% of 6 decks +42% synergy
Vault of Champions
80% of 5 decks +54% synergy
Godless Shrine
80% of 5 decks +39% synergy
Overgrown Tomb
80% of 15 decks +38% synergy
Command Tower
78% of 18 decks +4% synergy
Undergrowth Stadium
67% of 15 decks +41% synergy
Bountiful Promenade
60% of 5 decks +36% synergy
Verdant Catacombs
56% of 18 decks +44% synergy
Llanowar Wastes
53% of 15 decks +28% synergy
Exotic Orchard
50% of 18 decks +14% synergy
Twilight Mire
40% of 15 decks +30% synergy
Woodland Cemetery
40% of 15 decks +12% synergy
Misty Rainforest
28% of 18 decks +16% synergy
Tainted Wood
27% of 15 decks +14% synergy
Golgari Rot Farm
27% of 15 decks +9% synergy
Mana Confluence
22% of 18 decks +15% synergy
City of Brass
22% of 18 decks +14% synergy
Wooded Foothills
22% of 18 decks +12% synergy
Windswept Heath
22% of 18 decks +12% synergy
Marsh Flats
22% of 18 decks +11% synergy
Polluted Delta
22% of 18 decks +11% synergy
Evolving Wilds
22% of 18 decks +1% synergy
Blooming Marsh
20% of 15 decks +16% synergy
Gemstone Mine
17% of 18 decks +16% synergy
The Mycosynth Gardens
17% of 18 decks +14% synergy
Ash Barrens
17% of 18 decks +12% synergy
Bloodstained Mire
17% of 18 decks +6% synergy
Arid Mesa
17% of 18 decks +6% synergy