Treebeard, Gracious Host + Agatha's Soul Cauldron + Spike Feeder

Treebeard, Gracious Host
Agatha's Soul Cauldron
Spike Feeder

Requires
Treebeard, Gracious Host must be on the battlefield. Agatha's Soul Cauldron must be on the battlefield. Spike Feeder must be in exile (exiled by Agatha's Soul Cauldron). Treebeard has at least one +1/+1 counter on it.
Steps
  1. Activate Treebeard using Spike Feeder's second ability by removing a +1/+1 counter from it, causing you to gain 2 life.
  2. Treebeard triggers, putting two +1/+1 counters on itself.
  3. Repeat.
Results
Infinite +1/+1 counters on Treebeard and Halflings and Treefolk you control. Infinite lifegain. Infinite lifegain triggers.

Palladia-Mors
0.71% of 141 decks 1 decks
Wylie Duke, Atiin Hero
0.24% of 425 decks 1 decks
Treebeard, Gracious Host
0.15% of 1318 decks 2 decks
Lae'zel, Vlaakith's Champion // Master Chef
0.05% of 2164 decks 1 decks
Trelasarra, Moon Dancer
0.04% of 2285 decks 1 decks
Bilbo, Birthday Celebrant
0.02% of 4454 decks 1 decks
Rocco, Street Chef
0.02% of 6127 decks 1 decks
Najeela, the Blade-Blossom
0.01% of 10432 decks 1 decks
Sisay, Weatherlight Captain
0.01% of 11635 decks 1 decks
Frodo, Adventurous Hobbit // Sam, Loyal Attendant
0.01% of 12950 decks 1 decks
Kenrith, the Returned King
0.00% of 20704 decks 1 decks
Top Cards
Devoted Druid
58% of 12 decks +57% synergy
Walking Ballista
58% of 12 decks +56% synergy
Heroic Intervention
58% of 12 decks +45% synergy
Path to Exile
58% of 12 decks +38% synergy
Swords to Plowshares
58% of 12 decks +30% synergy
Heliod, Sun-Crowned
50% of 12 decks +48% synergy
Birds of Paradise
50% of 12 decks +38% synergy
Scurry Oak
42% of 12 decks +41% synergy
Rosie Cotton of South Lane
42% of 12 decks +40% synergy
Eladamri's Call
42% of 12 decks +39% synergy
Creatures
Agatha of the Vile Cauldron
60% of 5 decks +60% synergy
Kutzil, Malamet Exemplar
60% of 5 decks +55% synergy
Orcish Bowmasters
60% of 5 decks +54% synergy
Avacyn's Pilgrim
42% of 12 decks +38% synergy
Kami of Whispered Hopes
42% of 12 decks +38% synergy
Delighted Halfling
42% of 12 decks +35% synergy
Esper Sentinel
42% of 12 decks +32% synergy
Triskelion
33% of 12 decks +33% synergy
Immaculate Magistrate
33% of 12 decks +33% synergy
Essence Warden
33% of 12 decks +32% synergy
Soul's Attendant
33% of 12 decks +32% synergy
Gyre Sage
33% of 12 decks +32% synergy
Selvala, Heart of the Wilds
33% of 12 decks +31% synergy
Soul Warden
33% of 12 decks +31% synergy
Vizier of Remedies
25% of 12 decks +25% synergy
Ivy Lane Denizen
25% of 12 decks +24% synergy
Conclave Mentor
25% of 12 decks +24% synergy
Archangel of Thune
25% of 12 decks +24% synergy
Samwise Gamgee
25% of 12 decks +24% synergy
Prosperous Innkeeper
25% of 12 decks +24% synergy
The Gaffer
25% of 12 decks +24% synergy
Gilded Goose
25% of 12 decks +23% synergy
Serra Ascendant
25% of 12 decks +23% synergy
Ranger-Captain of Eos
25% of 12 decks +23% synergy
Incubation Druid
25% of 12 decks +23% synergy
Peregrin Took
25% of 12 decks +22% synergy
Forgotten Ancient
25% of 12 decks +22% synergy
Academy Manufactor
25% of 12 decks +21% synergy
Fyndhorn Elves
25% of 12 decks +19% synergy
Llanowar Elves
25% of 12 decks +15% synergy
Instants
Chord of Calling
33% of 12 decks +31% synergy
Worldly Tutor
33% of 12 decks +27% synergy
Enlightened Tutor
33% of 12 decks +25% synergy
Reprieve
25% of 12 decks +23% synergy
Silence
25% of 12 decks +22% synergy
Veil of Summer
25% of 12 decks +22% synergy
Sorceries
Cultivate
33% of 12 decks +11% synergy
Tooth and Nail
25% of 12 decks +24% synergy
Green Sun's Zenith
25% of 12 decks +22% synergy
Finale of Devastation
25% of 12 decks +21% synergy
Farseek
25% of 12 decks +9% synergy
Utility Artifacts
Aetherflux Reservoir
42% of 12 decks +38% synergy
The One Ring
33% of 12 decks +24% synergy
Alhammarret's Archive
25% of 12 decks +23% synergy
Ozolith, the Shattered Spire
25% of 12 decks +22% synergy
The Ozolith
25% of 12 decks +22% synergy
Enchantments
Cathars' Crusade
33% of 12 decks +31% synergy
Sylvan Library
33% of 12 decks +28% synergy
Authority of the Consuls
25% of 12 decks +23% synergy
Hardened Scales
25% of 12 decks +21% synergy
Battles
Planeswalkers
Grist, the Hunger Tide
60% of 5 decks +59% synergy
Utility Lands
Boseiju, Who Endures
58% of 12 decks +49% synergy
Yavimaya, Cradle of Growth
58% of 12 decks +49% synergy
The Shire
25% of 12 decks +23% synergy
Urza's Saga
25% of 12 decks +18% synergy
Ancient Tomb
25% of 12 decks +14% synergy
Mana Artifacts
Sol Ring
75% of 12 decks -10% synergy
Arcane Signet
58% of 12 decks -13% synergy
Chrome Mox
25% of 12 decks +19% synergy
Mana Crypt
25% of 12 decks +14% synergy
Lands
Command Tower
75% of 12 decks +1% synergy
Temple Garden
67% of 12 decks +58% synergy
Overgrown Tomb
60% of 5 decks +51% synergy
Windswept Heath
58% of 12 decks +48% synergy
Marsh Flats
50% of 12 decks +39% synergy
Verdant Catacombs
50% of 12 decks +38% synergy
Savannah
42% of 12 decks +39% synergy
Brushland
42% of 12 decks +38% synergy
Bountiful Promenade
42% of 12 decks +36% synergy
Wooded Foothills
42% of 12 decks +32% synergy
Flooded Strand
42% of 12 decks +31% synergy
Arid Mesa
42% of 12 decks +31% synergy
Misty Rainforest
42% of 12 decks +30% synergy
Sunpetal Grove
33% of 12 decks +28% synergy
City of Brass
33% of 12 decks +25% synergy
Exotic Orchard
33% of 12 decks -2% synergy
Overgrown Farmland
25% of 12 decks +21% synergy
Gemstone Caverns
25% of 12 decks +20% synergy
Canopy Vista
25% of 12 decks +17% synergy
Bloodstained Mire
25% of 12 decks +15% synergy