Druid's Call
Cathars' Crusade
Walking Ballista
Pir, Imaginative Rascal
1

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
Druid's Call attached to Walking Ballista. Walking Ballista has at least three +1/+1 counters.

   Steps

How does this combo work?
1
Activate Walking Ballista's first ability by removing a +1/+1 counter from it, dealing 1 damage to itself.
2
Druid's Call triggers, creating a 1/1 Squirrel creature token.
3
The Squirrel enters the battlefield, triggering Cathars' Crusade, putting two +1/+1 counters on each creature you control.
4
Repeat.

   Results

What do I get from this combo?
Infinite +1/+1 counters
Infinite creature tokens
Infinite ETB
Ikra Shidiqi, the Usurper // Yoshimaru, Ever Faithful
1.85% of 54 decks 1 decks
Leinore, Autumn Sovereign
0.05% of 1929 decks 1 decks
Creatures
Pious Evangel
100% of 1 decks +100% synergy
Thalisse, Reverent Medium
100% of 1 decks +97% synergy
Teysa Karlov
100% of 1 decks +95% synergy
Chatterfang, Squirrel General
100% of 1 decks +95% synergy
Elas il-Kor, Sadistic Pilgrim
100% of 1 decks +90% synergy
Kutzil, Malamet Exemplar
100% of 1 decks +86% synergy
Liege of the Hollows
50% of 2 decks +50% synergy
Avatar of the Resolute
50% of 2 decks +50% synergy
Social Climber
50% of 2 decks +50% synergy
Kor Celebrant
50% of 2 decks +50% synergy
Crystalline Crawler
50% of 2 decks +50% synergy
Healer of the Pride
50% of 2 decks +50% synergy
Triskelion
50% of 2 decks +50% synergy
Nut Collector
50% of 2 decks +50% synergy
Elite Scaleguard
50% of 2 decks +49% synergy
Squirrel Mob
50% of 2 decks +49% synergy
Ochre Jelly
50% of 2 decks +49% synergy
Ainok Bond-Kin
50% of 2 decks +49% synergy
Distinguished Conjurer
50% of 2 decks +49% synergy
Impassioned Orator
50% of 2 decks +49% synergy
Lunarch Veteran
50% of 2 decks +49% synergy
Benevolent Hydra
50% of 2 decks +49% synergy
Primordial Hydra
50% of 2 decks +49% synergy
Armorcraft Judge
50% of 2 decks +49% synergy
Biophagus
50% of 2 decks +48% synergy
Ivy Lane Denizen
50% of 2 decks +48% synergy
Loyal Guardian
50% of 2 decks +48% synergy
Duskshell Crawler
50% of 2 decks +48% synergy
Mycoloth
50% of 2 decks +48% synergy
Guardian of Faith
50% of 2 decks +48% synergy
Verdant Sun's Avatar
50% of 2 decks +48% synergy
Daxos, Blessed by the Sun
50% of 2 decks +48% synergy
Trostani, Selesnya's Voice
50% of 2 decks +48% synergy
Queen Allenal of Ruadach
50% of 2 decks +48% synergy
Prosperous Innkeeper
50% of 2 decks +47% synergy
Vigor
50% of 2 decks +47% synergy
Rhys the Redeemed
50% of 2 decks +47% synergy
Essence Warden
50% of 2 decks +47% synergy
Augur of Autumn
50% of 2 decks +47% synergy
Suture Priest
50% of 2 decks +47% synergy
Defiler of Vigor
50% of 2 decks +47% synergy
Ashaya, Soul of the Wild
50% of 2 decks +47% synergy
Soul's Attendant
50% of 2 decks +47% synergy
Nyxbloom Ancient
50% of 2 decks +46% synergy
Gyre Sage
50% of 2 decks +46% synergy
Managorger Hydra
50% of 2 decks +46% synergy
Conclave Mentor
50% of 2 decks +46% synergy
Peregrin Took
50% of 2 decks +46% synergy
Jaheira, Friend of the Forest
50% of 2 decks +45% synergy
Incubation Druid
50% of 2 decks +45% synergy
Instants
Stroke of Midnight
100% of 1 decks +90% synergy
Kabira Takedown
50% of 2 decks +48% synergy
Sejiri Shelter
50% of 2 decks +47% synergy
Clever Concealment
50% of 2 decks +46% synergy
Inspiring Call
50% of 2 decks +42% synergy
Nature's Claim
50% of 2 decks +42% synergy
Return of the Wildspeaker
50% of 2 decks +37% synergy
Generous Gift
50% of 2 decks +25% synergy
Heroic Intervention
50% of 2 decks +20% synergy
Beast Within
50% of 2 decks +13% synergy
Path to Exile
50% of 2 decks +3% synergy
Swords to Plowshares
50% of 2 decks -13% synergy
Sorceries
Chatterstorm
50% of 2 decks +49% synergy
Council's Judgment
50% of 2 decks +49% synergy
Damning Verdict
50% of 2 decks +48% synergy
Shamanic Revelation
50% of 2 decks +42% synergy
Austere Command
50% of 2 decks +37% synergy
Utility Artifacts
Andúril, Narsil Reforged
100% of 1 decks +99% synergy
Orochi Hatchery
50% of 2 decks +50% synergy
Blasting Station
50% of 2 decks +49% synergy
Mycosynth Lattice
50% of 2 decks +49% synergy
Clock of Omens
50% of 2 decks +49% synergy
Contagion Engine
50% of 2 decks +49% synergy
Contagion Clasp
50% of 2 decks +49% synergy
Thousand-Year Elixir
50% of 2 decks +48% synergy
Isochron Scepter
50% of 2 decks +48% synergy
Helm of the Host
50% of 2 decks +47% synergy
Ozolith, the Shattered Spire
50% of 2 decks +45% synergy
Lightning Greaves
50% of 2 decks +25% synergy
Enchantments
Conspiracy
100% of 1 decks +99% synergy
Branching Evolution
100% of 2 decks +94% synergy
Cloakwood Hermit
50% of 2 decks +50% synergy
Dictate of Karametra
50% of 2 decks +49% synergy
Earthcraft
50% of 2 decks +49% synergy
Heartbeat of Spring
50% of 2 decks +49% synergy
Resourceful Defense
50% of 2 decks +49% synergy
Squirrel Nest
50% of 2 decks +49% synergy
Leyline of Abundance
50% of 2 decks +49% synergy
Mana Reflection
50% of 2 decks +48% synergy
Song of the Dryads
50% of 2 decks +48% synergy
Growing Ranks
50% of 2 decks +48% synergy
Zendikar Resurgent
50% of 2 decks +48% synergy
Primal Vigor
50% of 2 decks +47% synergy
Darksteel Mutation
50% of 2 decks +44% synergy
Felidar Retreat
50% of 2 decks +43% synergy
Tribute to the World Tree
50% of 2 decks +43% synergy
Parallel Lives
50% of 2 decks +43% synergy
Anointed Procession
50% of 2 decks +42% synergy
Hardened Scales
50% of 2 decks +41% synergy
Sylvan Library
50% of 2 decks +39% synergy
Mirari's Wake
50% of 2 decks +37% synergy
Utility Lands
Ghost Quarter
50% of 2 decks +48% synergy
Karn's Bastion
50% of 2 decks +45% synergy
Yavimaya, Cradle of Growth
50% of 2 decks +41% synergy
Urborg, Tomb of Yawgmoth
50% of 2 decks +41% synergy
Temple of the False God
50% of 2 decks +40% synergy
Rogue's Passage
50% of 2 decks +30% synergy
Mana Artifacts
Sol Ring
100% of 2 decks +16% synergy
Astral Cornucopia
50% of 2 decks +49% synergy
Everflowing Chalice
50% of 2 decks +46% synergy
Lands
Snowfield Sinkhole
100% of 1 decks +97% synergy
Woodland Chasm
100% of 1 decks +96% synergy
Deathcap Glade
100% of 1 decks +86% synergy
Shattered Sanctum
100% of 1 decks +86% synergy
Overgrown Farmland
100% of 2 decks +84% synergy
Bountiful Promenade
100% of 2 decks +76% synergy
Vault of Champions
100% of 1 decks +74% synergy
Sandsteppe Citadel
100% of 1 decks +74% synergy
Woodland Cemetery
100% of 1 decks +70% synergy
Indatha Triome
100% of 1 decks +70% synergy
Isolated Chapel
100% of 1 decks +70% synergy
Canopy Vista
100% of 2 decks +63% synergy
Temple Garden
100% of 2 decks +61% synergy
Godless Shrine
100% of 1 decks +60% synergy
Overgrown Tomb
100% of 1 decks +58% synergy
Command Tower
100% of 2 decks +26% synergy
Arctic Treeline
50% of 2 decks +47% synergy
Wooded Bastion
50% of 2 decks +46% synergy
Branchloft Pathway
50% of 2 decks +42% synergy
Sungrass Prairie
50% of 2 decks +38% synergy
Fortified Village
50% of 2 decks +34% synergy
Brushland
50% of 2 decks +33% synergy
Sunpetal Grove
50% of 2 decks +25% synergy
Exotic Orchard
50% of 2 decks +14% synergy