Agatha's Soul Cauldron + Spike Feeder + Scion of the Swarm

Agatha's Soul Cauldron
Spike Feeder
Scion of the Swarm

Requires
Agatha's Soul Cauldron must be on the battlefield. Spike Feeder must be in exile (exiled by Agatha's Soul Cauldron). Scion of the Swarm must be on the battlefield. Scion of the Swarm has at least one +1/+1 counter on it.
Steps
  1. Activate Scion of the Swarm using Spike Feeder's second ability by removing a +1/+1 counter from it, causing you to gain 2 life.
  2. Scion of the Swarm triggers, putting a +1/+1 counter on it.
  3. Repeat.
Results
Infinite lifegain. Infinite lifegain triggers.

Valentin, Dean of the Vein
0.23% of 432 decks 1 decks
Atraxa, Praetors' Voice
0.00% of 35211 decks 1 decks
Dina, Soul Steeper
0.01% of 7676 decks 1 decks
Creatures
Jubilant Mascot
100% of 1 decks +100% synergy
Expedition Raptor
100% of 1 decks +100% synergy
Relief Captain
100% of 1 decks +100% synergy
Gavony Silversmith
100% of 1 decks +100% synergy
Anointer of Valor
100% of 1 decks +100% synergy
Sterling Supplier
100% of 1 decks +100% synergy
Gideon's Company
100% of 1 decks +100% synergy
Angelic Quartermaster
100% of 1 decks +100% synergy
Twinblade Paladin
100% of 1 decks +100% synergy
Alharu, Solemn Ritualist
100% of 1 decks +100% synergy
Skyclave Cleric
100% of 1 decks +100% synergy
Blood Researcher
100% of 3 decks +100% synergy
Celestial Unicorn
100% of 1 decks +100% synergy
Anafenza, the Foremost
100% of 1 decks +99% synergy
Ajani's Pridemate
100% of 1 decks +99% synergy
Voice of the Blessed
100% of 1 decks +99% synergy
Aron, Benalia's Ruin
100% of 1 decks +99% synergy
Karlov of the Ghost Council
100% of 1 decks +99% synergy
Stormtide Leviathan
100% of 1 decks +98% synergy
Archetype of Imagination
100% of 1 decks +98% synergy
Archangel of Thune
100% of 1 decks +98% synergy
Glasspool Mimic
100% of 1 decks +97% synergy
Ageless Entity
67% of 3 decks +66% synergy
Essence Warden
67% of 3 decks +64% synergy
Beledros Witherbloom
67% of 3 decks +63% synergy
Dune Chanter
50% of 2 decks +49% synergy
Overgrown Arch
33% of 3 decks +33% synergy
Wall of Limbs
33% of 3 decks +33% synergy
Gladehart Cavalry
33% of 3 decks +33% synergy
Aetherborn Marauder
33% of 3 decks +33% synergy
Deathless Knight
33% of 3 decks +33% synergy
Turntimber Ranger
33% of 3 decks +33% synergy
Bloodbond Vampire
33% of 3 decks +33% synergy
Joiner Adept
33% of 3 decks +33% synergy
Deepwood Denizen
33% of 3 decks +33% synergy
Golden Guardian
33% of 3 decks +33% synergy
Mindless Automaton
33% of 3 decks +33% synergy
Sengir, the Dark Baron
33% of 3 decks +33% synergy
Ascendant Acolyte
33% of 3 decks +33% synergy
Kazandu Mammoth
33% of 3 decks +33% synergy
Triskelion
33% of 3 decks +33% synergy
Kazandu Nectarpot
33% of 3 decks +33% synergy
Jaddi Offshoot
33% of 3 decks +33% synergy
Epicure of Blood
33% of 3 decks +33% synergy
Sapling of Colfenor
33% of 3 decks +33% synergy
Bloodthirsty Aerialist
33% of 3 decks +33% synergy
Defiant Bloodlord
33% of 3 decks +33% synergy
Wildwood Scourge
33% of 3 decks +33% synergy
Ochre Jelly
33% of 3 decks +33% synergy
Scute Mob
33% of 3 decks +33% synergy
Instants
Sejiri Shelter
100% of 1 decks +96% synergy
Arbor Armament
33% of 3 decks +33% synergy
Early Harvest
33% of 3 decks +33% synergy
Evolution Charm
33% of 3 decks +33% synergy
Infuse with Vitality
33% of 3 decks +33% synergy
Rushed Rebirth
33% of 3 decks +32% synergy
Invigorating Surge
33% of 3 decks +32% synergy
Silkguard
33% of 3 decks +32% synergy
Mortality Spear
33% of 3 decks +30% synergy
Gaea's Gift
33% of 3 decks +30% synergy
Snakeskin Veil
33% of 3 decks +29% synergy
Chord of Calling
33% of 3 decks +28% synergy
Go for the Throat
33% of 3 decks +26% synergy
Archdruid's Charm
33% of 3 decks +26% synergy
Inspiring Call
33% of 3 decks +26% synergy
Village Rites
33% of 3 decks +23% synergy
Putrefy
33% of 3 decks +17% synergy
Dark Ritual
33% of 3 decks +11% synergy
Beast Within
33% of 3 decks -6% synergy
Sorceries
Makindi Stampede
100% of 1 decks +100% synergy
Ondu Inversion
100% of 1 decks +98% synergy
Sea Gate Restoration
100% of 1 decks +95% synergy
Bala Ged Recovery
67% of 3 decks +58% synergy
Sanguine Indulgence
33% of 3 decks +33% synergy
Devouring Tendrils
33% of 3 decks +33% synergy
Uncage the Menagerie
33% of 3 decks +33% synergy
Essence Harvest
33% of 3 decks +33% synergy
Urborg Repossession
33% of 3 decks +33% synergy
Dig Up
33% of 3 decks +31% synergy
Regrowth
33% of 3 decks +30% synergy
Diabolic Tutor
33% of 3 decks +27% synergy
Diabolic Intent
33% of 3 decks +25% synergy
Sign in Blood
33% of 3 decks +24% synergy
Culling Ritual
33% of 3 decks +22% synergy
Nature's Lore
33% of 3 decks +1% synergy
Cultivate
33% of 3 decks -13% synergy
Utility Artifacts
Tablet of the Guilds
67% of 3 decks +66% synergy
Fountain of Renewal
67% of 3 decks +66% synergy
Kraken's Eye
33% of 3 decks +33% synergy
Staff of the Wild Magus
33% of 3 decks +33% synergy
Chalice of Life
33% of 3 decks +33% synergy
Staff of the Death Magus
33% of 3 decks +33% synergy
Demon's Horn
33% of 3 decks +33% synergy
Campfire
33% of 3 decks +33% synergy
Animation Module
33% of 3 decks +33% synergy
Cosmos Elixir
33% of 3 decks +33% synergy
Andúril, Narsil Reforged
33% of 3 decks +32% synergy
Bow of Nylea
33% of 3 decks +31% synergy
Chimil, the Inner Sun
33% of 3 decks +31% synergy
Ozolith, the Shattered Spire
33% of 3 decks +27% synergy
Enchantments
Profane Procession
100% of 1 decks +100% synergy
Arcane Adaptation
100% of 1 decks +99% synergy
Legion's Landing
100% of 1 decks +99% synergy
Abzan Ascendancy
100% of 1 decks +98% synergy
Hadana's Climb
100% of 1 decks +98% synergy
Innkeeper's Talent
100% of 1 decks +91% synergy
Well Rested
50% of 2 decks +48% synergy
Sheltered Aerie
33% of 3 decks +33% synergy
Urban Utopia
33% of 3 decks +33% synergy
Dogged Pursuit
33% of 3 decks +33% synergy
Grasping Shadows
33% of 3 decks +33% synergy
Ill-Gotten Inheritance
33% of 3 decks +33% synergy
New Horizons
33% of 3 decks +33% synergy
Agent of the Shadow Thieves
33% of 3 decks +33% synergy
Song of Freyalise
33% of 3 decks +32% synergy
Abundant Growth
33% of 3 decks +32% synergy
Hydra's Growth
33% of 3 decks +31% synergy
Druid Class
33% of 3 decks +30% synergy
Court of Garenbrig
33% of 3 decks +30% synergy
Exquisite Blood
33% of 3 decks +28% synergy
Growing Rites of Itlimoc
33% of 3 decks +28% synergy
Sanguine Bond
33% of 3 decks +28% synergy
Binding the Old Gods
33% of 3 decks +28% synergy
Hardened Scales
33% of 3 decks +24% synergy
Moldervine Reclamation
33% of 3 decks +24% synergy
Wild Growth
33% of 3 decks +22% synergy
Phyrexian Arena
33% of 3 decks +19% synergy
Utility Lands
Ancient Den
100% of 1 decks +95% synergy
Gavony Township
100% of 1 decks +90% synergy
Halls of Mist
33% of 3 decks +33% synergy
Lotus Vale
33% of 3 decks +33% synergy
Sapseep Forest
33% of 3 decks +33% synergy
Drannith Ruins
33% of 3 decks +33% synergy
Radiant Fountain
33% of 3 decks +32% synergy
Lotus Field
33% of 3 decks +32% synergy
Gingerbread Cabin
33% of 3 decks +32% synergy
Maze of Ith
33% of 3 decks +31% synergy
Witch's Cottage
33% of 3 decks +30% synergy
Restless Cottage
33% of 3 decks +28% synergy
Oran-Rief, the Vastwood
33% of 3 decks +28% synergy
Mortuary Mire
33% of 3 decks +28% synergy
Karn's Bastion
33% of 3 decks +28% synergy
Mosswort Bridge
33% of 3 decks +23% synergy
Mana Artifacts
Pristine Talisman
67% of 3 decks +65% synergy
Arcane Signet
67% of 3 decks -5% synergy
Sol Ring
67% of 3 decks -18% synergy
Grim Monolith
33% of 3 decks +31% synergy
Chrome Mox
33% of 3 decks +27% synergy
Lotus Petal
33% of 3 decks +27% synergy
Chromatic Lantern
33% of 3 decks +24% synergy
Lands
Riftstone Portal
100% of 1 decks +99% synergy
Treva's Ruins
100% of 1 decks +99% synergy
Dromar's Cavern
100% of 1 decks +98% synergy
Citadel Gate
100% of 1 decks +98% synergy
Sea Gate
100% of 1 decks +98% synergy
Thriving Isle
100% of 1 decks +97% synergy
Thriving Heath
100% of 1 decks +97% synergy
Sandsteppe Citadel
100% of 1 decks +74% synergy
Seaside Citadel
100% of 1 decks +74% synergy
Opulent Palace
100% of 1 decks +73% synergy
Arcane Sanctum
100% of 1 decks +72% synergy
Raffine's Tower
100% of 1 decks +72% synergy
Zagoth Triome
100% of 1 decks +69% synergy
Indatha Triome
100% of 1 decks +69% synergy
Spara's Headquarters
100% of 1 decks +68% synergy
Command Tower
100% of 3 decks +26% synergy
Jungle Hollow
67% of 3 decks +58% synergy
Exotic Orchard
67% of 3 decks +31% synergy
Meteor Crater
33% of 3 decks +33% synergy
Hall of Oracles
33% of 3 decks +33% synergy
Uncharted Haven
33% of 3 decks +33% synergy
Riveteers Overlook
33% of 3 decks +31% synergy
Black Dragon Gate
33% of 3 decks +31% synergy
Foul Orchard
33% of 3 decks +31% synergy
Manor Gate
33% of 3 decks +31% synergy
Thriving Moor
33% of 3 decks +31% synergy
Thriving Grove
33% of 3 decks +31% synergy
Forbidden Orchard
33% of 3 decks +31% synergy
Blooming Marsh
33% of 3 decks +29% synergy
Reflecting Pool
33% of 3 decks +28% synergy
Golgari Guildgate
33% of 3 decks +27% synergy
Haunted Mire
33% of 3 decks +25% synergy
Bloodstained Mire
33% of 3 decks +23% synergy
Windswept Heath
33% of 3 decks +23% synergy
Terramorphic Expanse
33% of 3 decks +18% synergy
Path of Ancestry
33% of 3 decks +12% synergy
Llanowar Wastes
33% of 3 decks +8% synergy
Woodland Cemetery
33% of 3 decks +6% synergy