Druid's Call + Cathars' Crusade + Walking Ballista + Vorinclex, Monstrous Raider

Druid's Call
Cathars' Crusade
Walking Ballista
Vorinclex, Monstrous Raider

Requires
Druid's Call must be on the battlefield. Cathars' Crusade must be on the battlefield. Walking Ballista must be on the battlefield. Vorinclex, Monstrous Raider must be on the battlefield. Druid's Call attached to Walking Ballista. Walking Ballista has at least three +1/+1 counters.
Steps
  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
Infinite +1/+1 counters. Infinite creature tokens. Infinite ETB.

Lae'zel, Vlaakith's Champion // Master Chef
0.09% of 2258 decks 2 decks
Hamza, Guardian of Arashin
0.03% of 3869 decks 1 decks
Creatures
Poison Dart Frog
100% of 1 decks +98% synergy
Vigor
100% of 3 decks +97% synergy
Evolution Sage
100% of 3 decks +95% synergy
Defiler of Vigor
100% of 3 decks +95% synergy
Mikaeus, the Lunarch
100% of 3 decks +88% synergy
Conclave Mentor
100% of 3 decks +88% synergy
Sovereign Okinec Ahau
100% of 1 decks +86% synergy
Abzan Falconer
100% of 3 decks +85% synergy
Kutzil, Malamet Exemplar
100% of 1 decks +56% synergy
Old One Eye
67% of 3 decks +66% synergy
Aberrant
67% of 3 decks +66% synergy
Biophagus
67% of 3 decks +64% synergy
Cankerbloom
67% of 3 decks +63% synergy
Wildwood Scourge
67% of 3 decks +63% synergy
Herd Baloth
67% of 3 decks +63% synergy
Scurry Oak
67% of 3 decks +63% synergy
Thalia, Heretic Cathar
67% of 3 decks +62% synergy
Loyal Guardian
67% of 3 decks +62% synergy
Hamza, Guardian of Arashin
67% of 3 decks +61% synergy
Scavenging Ooze
67% of 3 decks +60% synergy
Managorger Hydra
67% of 3 decks +60% synergy
Elesh Norn, Grand Cenobite
67% of 3 decks +56% synergy
Esper Sentinel
67% of 3 decks +48% synergy
Birds of Paradise
67% of 3 decks +46% synergy
Eternal Witness
67% of 3 decks +45% synergy
Triskelion
33% of 3 decks +33% synergy
Basri's Lieutenant
33% of 3 decks +31% synergy
Benevolent Hydra
33% of 3 decks +31% synergy
Stonecoil Serpent
33% of 3 decks +31% synergy
Selvala, Heart of the Wilds
33% of 3 decks +30% synergy
Lae'zel, Vlaakith's Champion
33% of 3 decks +30% synergy
Fertilid
33% of 3 decks +29% synergy
Incubation Druid
33% of 3 decks +28% synergy
Renata, Called to the Hunt
33% of 3 decks +28% synergy
Luminarch Aspirant
33% of 3 decks +28% synergy
Armorcraft Judge
33% of 3 decks +27% synergy
Duskshell Crawler
33% of 3 decks +27% synergy
Gyre Sage
33% of 3 decks +26% synergy
Abzan Battle Priest
33% of 3 decks +26% synergy
Good-Fortune Unicorn
33% of 3 decks +26% synergy
Avenger of Zendikar
33% of 3 decks +25% synergy
Forgotten Ancient
33% of 3 decks +25% synergy
Heliod, Sun-Crowned
33% of 3 decks +25% synergy
Rishkar, Peema Renegade
33% of 3 decks +24% synergy
Kodama of the West Tree
33% of 3 decks +24% synergy
Torens, Fist of the Angels
33% of 3 decks +23% synergy
Sun Titan
33% of 3 decks +21% synergy
Shalai, Voice of Plenty
33% of 3 decks +16% synergy
Beast Whisperer
33% of 3 decks +15% synergy
Champion of Lambholt
33% of 3 decks +7% synergy
Instants
Flawless Maneuver
100% of 3 decks +87% synergy
Heroic Intervention
100% of 3 decks +65% synergy
Generous Gift
100% of 3 decks +64% synergy
Beast Within
100% of 3 decks +57% synergy
Path to Exile
100% of 3 decks +48% synergy
Swords to Plowshares
100% of 3 decks +32% synergy
Rebuff the Wicked
67% of 3 decks +65% synergy
Teferi's Protection
67% of 3 decks +47% synergy
Vastwood Fortification
33% of 3 decks +32% synergy
Return of the Wildspeaker
33% of 3 decks +20% synergy
Unbreakable Formation
33% of 3 decks +16% synergy
Inspiring Call
33% of 3 decks +16% synergy
Sorceries
Crisis of Conscience
100% of 1 decks +99% synergy
Damning Verdict
100% of 3 decks +93% synergy
Three Visits
100% of 3 decks +80% synergy
Nature's Lore
67% of 3 decks +38% synergy
Rampant Growth
67% of 3 decks +31% synergy
Cultivate
67% of 3 decks +21% synergy
Biogenic Upgrade
33% of 3 decks +32% synergy
Basri's Solidarity
33% of 3 decks +32% synergy
Unnatural Restoration
33% of 3 decks +31% synergy
Wrath of God
33% of 3 decks +25% synergy
Farewell
33% of 3 decks +20% synergy
Kodama's Reach
33% of 3 decks +3% synergy
Utility Artifacts
Tarrian's Soulcleaver
100% of 1 decks +99% synergy
The Ozolith
100% of 3 decks +91% synergy
Ozolith, the Shattered Spire
100% of 2 decks +89% synergy
The Great Henge
100% of 3 decks +88% synergy
Sword of Truth and Justice
67% of 3 decks +65% synergy
Swiftfoot Boots
67% of 3 decks +39% synergy
Norn's Annex
33% of 3 decks +32% synergy
Ashnod's Altar
33% of 3 decks +30% synergy
Basilisk Collar
33% of 3 decks +30% synergy
Enchantments
Branching Evolution
100% of 3 decks +91% synergy
Doubling Season
100% of 3 decks +87% synergy
Tribute to the World Tree
100% of 2 decks +83% synergy
Fight Rigging
67% of 3 decks +65% synergy
Resourceful Defense
67% of 3 decks +64% synergy
Citadel Siege
67% of 3 decks +64% synergy
Hydra's Growth
67% of 3 decks +64% synergy
Smothering Tithe
67% of 3 decks +50% synergy
Aura Shards
67% of 3 decks +48% synergy
Wild Growth
67% of 3 decks +45% synergy
Felidar Retreat
67% of 3 decks +45% synergy
Rite of Passage
33% of 3 decks +33% synergy
Nature's Revolt
33% of 3 decks +33% synergy
Guardian Project
33% of 3 decks +21% synergy
Sylvan Library
33% of 3 decks +20% synergy
Hardened Scales
33% of 3 decks +16% synergy
Utopia Sprawl
33% of 3 decks +14% synergy
Planeswalkers
Nissa, Voice of Zendikar
67% of 3 decks +65% synergy
Basri Ket
67% of 3 decks +65% synergy
Ajani Steadfast
33% of 3 decks +32% synergy
Nissa, Who Shakes the World
33% of 3 decks +32% synergy
Nissa, Ascended Animist
33% of 3 decks +32% synergy
Ajani, Caller of the Pride
33% of 3 decks +30% synergy
Ajani, the Greathearted
33% of 3 decks +25% synergy
Utility Lands
Yavimaya, Cradle of Growth
100% of 3 decks +81% synergy
Gavony Township
100% of 3 decks +71% synergy
Tyrite Sanctum
67% of 3 decks +64% synergy
Nykthos, Shrine to Nyx
33% of 3 decks +28% synergy
Ancient Tomb
33% of 3 decks +28% synergy
Gaea's Cradle
33% of 3 decks +27% synergy
Oran-Rief, the Vastwood
33% of 3 decks +26% synergy
Karn's Bastion
33% of 3 decks +26% synergy
Temple of the False God
33% of 3 decks +25% synergy
Boseiju, Who Endures
33% of 3 decks +15% synergy
Reliquary Tower
33% of 3 decks +5% synergy
Mana Artifacts
Sol Ring
100% of 3 decks +23% synergy
Arcane Signet
67% of 3 decks +9% synergy
Mana Crypt
33% of 3 decks +29% synergy
Selesnya Signet
33% of 3 decks +12% synergy
Lands
Windswept Heath
100% of 3 decks +74% synergy
Overgrown Farmland
100% of 3 decks +64% synergy
Temple Garden
100% of 3 decks +56% synergy
Fortified Village
100% of 3 decks +55% synergy
Canopy Vista
100% of 3 decks +33% synergy
Command Tower
100% of 3 decks +16% synergy
Razorverge Thicket
67% of 3 decks +54% synergy
Sungrass Prairie
67% of 3 decks +34% synergy
Bountiful Promenade
67% of 3 decks +29% synergy
Sunpetal Grove
67% of 3 decks +20% synergy
Botanical Plaza
33% of 3 decks +27% synergy
Graypelt Refuge
33% of 3 decks +22% synergy
Savannah
33% of 3 decks +21% synergy
Wooded Bastion
33% of 3 decks +18% synergy
Scattered Groves
33% of 3 decks +15% synergy
Evolving Wilds
33% of 3 decks +13% synergy
Exotic Orchard
33% of 3 decks +12% synergy
Branchloft Pathway
33% of 3 decks +8% synergy
Brushland
33% of 3 decks +3% synergy
Temple of Plenty
33% of 3 decks -2% synergy