Druid's Call + Cathars' Crusade + Walking Ballista + Doubling Season

Druid's Call
Cathars' Crusade
Walking Ballista
Doubling Season

Requires
Druid's Call must be on the battlefield. Cathars' Crusade must be on the battlefield. Walking Ballista must be on the battlefield. Doubling Season 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 two 1/1 Squirrel creature tokens.
  3. The Squirrels enters the battlefield, triggering Cathars' Crusade twice, putting four +1/+1 counters on each creature you control.
  4. Repeat.
  5. Once you have infinite +1/+1 counters on Walking Ballista, you may remove them to deal infinite damage to any target(s).
Results
Infinite +1/+1 counters. Infinite creature tokens. Infinite damage. Infinite ETB.

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0.09% of 2292 decks 2 decks
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0.03% of 3934 decks 1 decks
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0.06% of 1628 decks 1 decks
New Cards
Tyvar, the Pummeler
100% of 1 decks +97% synergy
Enduring Vitality
100% of 1 decks +74% synergy
High Synergy Cards
Creatures
Dune Chanter
100% of 1 decks +100% synergy
Six
100% of 1 decks +99% synergy
Charismatic Conqueror
100% of 1 decks +97% synergy
Guide of Souls
100% of 1 decks +96% synergy
Basking Broodscale
100% of 1 decks +94% synergy
Evolution Witness
100% of 1 decks +92% synergy
Springheart Nantuko
100% of 1 decks +91% synergy
Ocelot Pride
100% of 1 decks +88% synergy
Vigor
75% of 4 decks +72% synergy
Vorinclex, Monstrous Raider
75% of 4 decks +72% synergy
Scurry Oak
75% of 4 decks +71% synergy
Defiler of Vigor
75% of 4 decks +70% synergy
Evolution Sage
75% of 4 decks +70% synergy
Mikaeus, the Lunarch
75% of 4 decks +64% synergy
Conclave Mentor
75% of 4 decks +63% synergy
Abzan Falconer
75% of 4 decks +60% synergy
Birds of Paradise
75% of 4 decks +54% synergy
Blossoming Tortoise
50% of 2 decks +50% synergy
Old One Eye
50% of 4 decks +49% synergy
Aberrant
50% of 4 decks +49% synergy
Poison Dart Frog
50% of 2 decks +48% synergy
Biophagus
50% of 4 decks +48% synergy
Treebeard, Gracious Host
50% of 2 decks +47% synergy
Cankerbloom
50% of 4 decks +47% synergy
Herd Baloth
50% of 4 decks +46% synergy
Wildwood Scourge
50% of 4 decks +46% synergy
Thalia, Heretic Cathar
50% of 4 decks +45% synergy
Loyal Guardian
50% of 4 decks +45% synergy
Scavenging Ooze
50% of 4 decks +44% synergy
Hamza, Guardian of Arashin
50% of 4 decks +44% synergy
Managorger Hydra
50% of 4 decks +43% synergy
Heliod, Sun-Crowned
50% of 4 decks +41% synergy
Rosie Cotton of South Lane
50% of 2 decks +40% synergy
Elesh Norn, Grand Cenobite
50% of 4 decks +39% synergy
Delighted Halfling
50% of 2 decks +39% synergy
Sovereign Okinec Ahau
50% of 2 decks +36% synergy
Esper Sentinel
50% of 4 decks +31% synergy
Eternal Witness
50% of 4 decks +29% synergy
Kutzil, Malamet Exemplar
50% of 2 decks +7% synergy
Silvanus's Invoker
25% of 4 decks +25% synergy
Titania, Voice of Gaea
25% of 4 decks +25% synergy
Hydra Omnivore
25% of 4 decks +24% synergy
Triskelion
25% of 4 decks +24% synergy
Ramunap Excavator
25% of 4 decks +24% synergy
Stoneforge Mystic
25% of 4 decks +23% synergy
Kodama of the East Tree
25% of 4 decks +23% synergy
Basri's Lieutenant
25% of 4 decks +23% synergy
Benevolent Hydra
25% of 4 decks +23% synergy
Recruiter of the Guard
25% of 4 decks +23% synergy
Stonecoil Serpent
25% of 4 decks +23% synergy
Instants
Razorgrass Ambush
100% of 1 decks +96% synergy
Flawless Maneuver
75% of 4 decks +62% synergy
Heroic Intervention
75% of 4 decks +40% synergy
Generous Gift
75% of 4 decks +39% synergy
Beast Within
75% of 4 decks +32% synergy
Path to Exile
75% of 4 decks +23% synergy
Swords to Plowshares
75% of 4 decks +7% synergy
Rebuff the Wicked
50% of 4 decks +48% synergy
Teferi's Protection
50% of 4 decks +30% synergy
Summoner's Pact
25% of 4 decks +24% synergy
Vastwood Fortification
25% of 4 decks +24% synergy
Secure the Wastes
25% of 4 decks +20% synergy
Return of the Wildspeaker
25% of 4 decks +12% synergy
Worldly Tutor
25% of 4 decks +12% synergy
Eladamri's Call
25% of 4 decks +9% synergy
Enlightened Tutor
25% of 4 decks +8% synergy
Unbreakable Formation
25% of 4 decks +8% synergy
Inspiring Call
25% of 4 decks +8% synergy
Sorceries
Bridgeworks Battle
100% of 1 decks +92% synergy
Damning Verdict
75% of 4 decks +68% synergy
Three Visits
75% of 4 decks +55% synergy
Crisis of Conscience
50% of 2 decks +49% synergy
Nature's Lore
50% of 4 decks +21% synergy
Rampant Growth
50% of 4 decks +15% synergy
Cultivate
50% of 4 decks +5% synergy
Time of Need
25% of 4 decks +24% synergy
Tooth and Nail
25% of 4 decks +24% synergy
Biogenic Upgrade
25% of 4 decks +23% synergy
Natural Order
25% of 4 decks +23% synergy
Basri's Solidarity
25% of 4 decks +23% synergy
Unnatural Restoration
25% of 4 decks +22% synergy
Triumph of the Hordes
25% of 4 decks +20% synergy
Green Sun's Zenith
25% of 4 decks +18% synergy
Finale of Devastation
25% of 4 decks +18% synergy
Wrath of God
25% of 4 decks +17% synergy
Farewell
25% of 4 decks +12% synergy
Kodama's Reach
25% of 4 decks -5% synergy
Utility Artifacts
Tarrian's Soulcleaver
100% of 2 decks +99% synergy
The Great Henge
75% of 4 decks +63% synergy
Ozolith, the Shattered Spire
67% of 3 decks +55% synergy
Sword of Truth and Justice
50% of 4 decks +49% synergy
Swiftfoot Boots
50% of 4 decks +22% synergy
Blade of the Bloodchief
25% of 4 decks +25% synergy
Mishra's Bauble
25% of 4 decks +25% synergy
Norn's Annex
25% of 4 decks +24% synergy
Sensei's Divining Top
25% of 4 decks +24% synergy
Ashnod's Altar
25% of 4 decks +22% synergy
Basilisk Collar
25% of 4 decks +21% synergy
Aetherflux Reservoir
25% of 4 decks +18% synergy
Enchantments
Well Rested
100% of 1 decks +96% synergy
Strength of the Harvest
100% of 1 decks +79% synergy
Branching Evolution
75% of 4 decks +66% synergy
Wild Growth
75% of 4 decks +54% synergy
Tribute to the World Tree
67% of 3 decks +50% synergy
Fight Rigging
50% of 4 decks +49% synergy
Resourceful Defense
50% of 4 decks +48% synergy
Citadel Siege
50% of 4 decks +47% synergy
Hydra's Growth
50% of 4 decks +47% synergy
Court of Garenbrig
50% of 2 decks +44% synergy
Sylvan Library
50% of 4 decks +37% synergy
Smothering Tithe
50% of 4 decks +33% synergy
Hardened Scales
50% of 4 decks +33% synergy
Aura Shards
50% of 4 decks +32% synergy
Utopia Sprawl
50% of 4 decks +31% synergy
Felidar Retreat
50% of 4 decks +28% synergy
Rite of Passage
25% of 4 decks +25% synergy
Nature's Revolt
25% of 4 decks +24% synergy
Survival of the Fittest
25% of 4 decks +23% synergy
Defense of the Heart
25% of 4 decks +22% synergy
Growing Rites of Itlimoc
25% of 4 decks +16% synergy
Guardian Project
25% of 4 decks +13% synergy
Battles
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50% of 2 decks +47% synergy
Planeswalkers
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50% of 4 decks +48% synergy
Basri Ket
50% of 4 decks +48% synergy
Karn, the Great Creator
25% of 4 decks +24% synergy
Ajani Steadfast
25% of 4 decks +24% synergy
Nissa, Ascended Animist
25% of 4 decks +24% synergy
Nissa, Who Shakes the World
25% of 4 decks +24% synergy
Ajani, Caller of the Pride
25% of 4 decks +22% synergy
Ajani, the Greathearted
25% of 4 decks +16% synergy
Utility Lands
Yavimaya, Cradle of Growth
75% of 4 decks +56% synergy
Gavony Township
75% of 4 decks +46% synergy
Tyrite Sanctum
50% of 4 decks +47% synergy
Ancient Tomb
50% of 4 decks +44% synergy
Gaea's Cradle
50% of 4 decks +44% synergy
Boseiju, Who Endures
50% of 4 decks +32% synergy
Vesuva
25% of 4 decks +25% synergy
Blinkmoth Nexus
25% of 4 decks +24% synergy
Inkmoth Nexus
25% of 4 decks +24% synergy
Argoth, Sanctum of Nature
25% of 4 decks +24% synergy
Lair of the Hydra
25% of 4 decks +23% synergy
Nykthos, Shrine to Nyx
25% of 4 decks +20% synergy
Oran-Rief, the Vastwood
25% of 4 decks +18% synergy
Karn's Bastion
25% of 4 decks +17% synergy
Temple of the False God
25% of 4 decks +16% synergy
Eiganjo, Seat of the Empire
25% of 4 decks +14% synergy
Reliquary Tower
25% of 4 decks -4% synergy
Mana Artifacts
Sol Ring
100% of 4 decks +23% synergy
Arcane Signet
75% of 4 decks +17% synergy
Fellwar Stone
25% of 4 decks +21% synergy
Mana Crypt
25% of 4 decks +21% synergy
Selesnya Signet
25% of 4 decks +4% synergy
Lands
Windswept Heath
100% of 4 decks +74% synergy
Temple Garden
100% of 4 decks +56% synergy
Command Tower
100% of 4 decks +16% synergy
Overgrown Farmland
75% of 4 decks +39% synergy
Fortified Village
75% of 4 decks +30% synergy
Canopy Vista
75% of 4 decks +8% synergy
Savannah
50% of 4 decks +38% synergy
Razorverge Thicket
50% of 4 decks +37% synergy
Wooded Bastion
50% of 4 decks +35% synergy
Brushland
50% of 4 decks +20% synergy
Sungrass Prairie
50% of 4 decks +17% synergy
Bountiful Promenade
50% of 4 decks +12% synergy
Sunpetal Grove
50% of 4 decks +3% synergy
Flagstones of Trokair
25% of 4 decks +24% synergy
Mana Confluence
25% of 4 decks +22% synergy
City of Brass
25% of 4 decks +21% synergy
Flooded Strand
25% of 4 decks +20% synergy
Prismatic Vista
25% of 4 decks +20% synergy
Arid Mesa
25% of 4 decks +20% synergy
Verdant Catacombs
25% of 4 decks +19% synergy
Misty Rainforest
25% of 4 decks +19% synergy
Botanical Plaza
25% of 4 decks +19% synergy
Graypelt Refuge
25% of 4 decks +14% synergy
Horizon Canopy
25% of 4 decks +12% synergy
Scattered Groves
25% of 4 decks +6% synergy
Evolving Wilds
25% of 4 decks +5% synergy
Exotic Orchard
25% of 4 decks +4% synergy
Branchloft Pathway
25% of 4 decks +0% synergy
Selesnya Sanctuary
25% of 4 decks -10% synergy
Temple of Plenty
25% of 4 decks -10% synergy