Hapatra, Vizier of Poisons + Cathars' Crusade + Devoted Druid

Hapatra, Vizier of Poisons
Cathars' Crusade
Devoted Druid

Requires
Hapatra, Vizier of Poisons must be on the battlefield. Cathars' Crusade must be on the battlefield. Devoted Druid must be on the battlefield. Devoted Druid does not have summoning sickness. Devoted Druid does not have a -1/-1 counter on it.
Steps
  1. Activate Devoted Druid by tapping it, adding .
  2. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
  3. Hapatra triggers, creating a 1/1 Snake creature token.
  4. The Snake enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control.
  5. Repeat.
Results
Infinite creature tokens. Infinite ETB. Infinite green mana. Infinite +1/+1 counters.

Tayam, Luminous Enigma
0.12% of 5725 decks 7 decks
Atraxa, Praetors' Voice
0.01% of 35211 decks 4 decks
Ghave, Guru of Spores
0.05% of 6423 decks 3 decks
Garth One-Eye
0.02% of 4123 decks 1 decks
Bruse Tarl, Boorish Herder // Reyhan, Last of the Abzan
0.33% of 302 decks 1 decks
O-Kagachi, Vengeful Kami
0.08% of 1298 decks 1 decks
Anafenza, the Foremost
0.09% of 1107 decks 1 decks
Alharu, Solemn Ritualist // Reyhan, Last of the Abzan
0.32% of 311 decks 1 decks
Nethroi, Apex of Death
0.02% of 5695 decks 1 decks
Tana, the Bloodsower // Tymna the Weaver
0.03% of 2862 decks 1 decks
Thalia and The Gitrog Monster
0.01% of 12491 decks 1 decks
High Synergy Cards
Tekuthal, Inquiry Dominus
80% of 5 decks +77% synergy
Inexorable Tide
67% of 6 decks +64% synergy
Kitchen Finks
64% of 22 decks +63% synergy
Vizier of Remedies
55% of 22 decks +54% synergy
Good-Fortune Unicorn
55% of 22 decks +52% synergy
Ashnod's Altar
59% of 22 decks +51% synergy
Rosie Cotton of South Lane
44% of 9 decks +41% synergy
Young Wolf
41% of 22 decks +41% synergy
Carrion Feeder
45% of 22 decks +40% synergy
Zulaport Cutthroat
50% of 22 decks +40% synergy
Top Cards
Birds of Paradise
45% of 22 decks +19% synergy
Altar of Dementia
41% of 22 decks +38% synergy
Yawgmoth, Thran Physician
41% of 22 decks +37% synergy
Phyrexian Altar
41% of 22 decks +37% synergy
Enlightened Tutor
41% of 22 decks +23% synergy
Cultivate
41% of 22 decks -5% synergy
Safehold Elite
36% of 22 decks +36% synergy
Flourishing Defenses
36% of 22 decks +36% synergy
Nest of Scarabs
36% of 22 decks +36% synergy
Ivy Lane Denizen
36% of 22 decks +35% synergy
Creatures
Thrummingbird
50% of 6 decks +46% synergy
Viscera Seer
36% of 22 decks +27% synergy
Blood Artist
36% of 22 decks +25% synergy
Strangleroot Geist
32% of 22 decks +32% synergy
Putrid Goblin
32% of 22 decks +31% synergy
Obelisk Spider
32% of 22 decks +31% synergy
Eternal Witness
32% of 22 decks +11% synergy
Scurry Oak
27% of 22 decks +25% synergy
Walking Ballista
27% of 22 decks +25% synergy
Mikaeus, the Unhallowed
27% of 22 decks +25% synergy
Spore Frog
27% of 22 decks +24% synergy
Rishkar, Peema Renegade
27% of 22 decks +23% synergy
Avacyn's Pilgrim
27% of 22 decks +12% synergy
Kami of Whispered Hopes
25% of 12 decks +17% synergy
Heartmender
23% of 22 decks +23% synergy
Quillspike
23% of 22 decks +22% synergy
Geralf's Messenger
23% of 22 decks +22% synergy
Puppeteer Clique
23% of 22 decks +21% synergy
Knight of Autumn
23% of 22 decks +20% synergy
Heliod, Sun-Crowned
23% of 22 decks +19% synergy
Winding Constrictor
23% of 22 decks +19% synergy
Springbloom Druid
23% of 22 decks +19% synergy
Champion of Lambholt
23% of 22 decks +16% synergy
Sakura-Tribe Elder
23% of 22 decks +4% synergy
Elas il-Kor, Sadistic Pilgrim
19% of 21 decks +7% synergy
Cryptic Trilobite
18% of 22 decks +18% synergy
Butcher Ghoul
18% of 22 decks +18% synergy
Midnight Banshee
18% of 22 decks +18% synergy
Necroskitter
18% of 22 decks +18% synergy
Wall of Roots
18% of 22 decks +17% synergy
Anafenza, Kin-Tree Spirit
18% of 22 decks +17% synergy
Saffi Eriksdotter
18% of 22 decks +17% synergy
Luminous Broodmoth
18% of 22 decks +16% synergy
Managorger Hydra
18% of 22 decks +14% synergy
Grim Haruspex
18% of 22 decks +14% synergy
Conclave Mentor
18% of 22 decks +14% synergy
Chatterfang, Squirrel General
18% of 22 decks +13% synergy
Evolution Sage
18% of 22 decks +11% synergy
Pitiless Plunderer
18% of 22 decks +11% synergy
Bloom Tender
18% of 22 decks +10% synergy
Cruel Celebrant
18% of 22 decks +10% synergy
Deathrite Shaman
18% of 22 decks +6% synergy
Grim Poppet
14% of 22 decks +14% synergy
Rendclaw Trow
14% of 22 decks +14% synergy
Dusk Urchins
14% of 22 decks +13% synergy
Channeler Initiate
14% of 22 decks +13% synergy
Soul Snuffers
14% of 22 decks +13% synergy
Sigil Captain
14% of 22 decks +13% synergy
Carnifex Demon
14% of 22 decks +13% synergy
Melira, Sylvok Outcast
14% of 22 decks +13% synergy
Instants
Swords to Plowshares
36% of 22 decks -26% synergy
Worldly Tutor
32% of 22 decks +18% synergy
Assassin's Trophy
32% of 22 decks +2% synergy
Eladamri's Call
27% of 22 decks +16% synergy
Vampiric Tutor
27% of 22 decks +9% synergy
Chord of Calling
23% of 22 decks +17% synergy
Heroic Intervention
18% of 22 decks -11% synergy
Beast Within
18% of 22 decks -21% synergy
Path to Exile
18% of 22 decks -27% synergy
Cauldron Haze
14% of 22 decks +13% synergy
Noxious Revival
14% of 22 decks +8% synergy
Krosan Grip
14% of 22 decks +6% synergy
Generous Gift
14% of 22 decks -12% synergy
Sorceries
Demonic Tutor
36% of 22 decks +14% synergy
Farseek
32% of 22 decks -2% synergy
Three Visits
27% of 22 decks +3% synergy
Nature's Lore
27% of 22 decks -5% synergy
Black Sun's Zenith
23% of 22 decks +21% synergy
Kodama's Reach
23% of 22 decks -9% synergy
Incremental Blight
18% of 22 decks +18% synergy
Eldritch Evolution
18% of 22 decks +13% synergy
Green Sun's Zenith
18% of 22 decks +12% synergy
Diabolic Intent
18% of 22 decks +9% synergy
Eerie Ultimatum
18% of 22 decks +6% synergy
Rampant Growth
18% of 22 decks -17% synergy
Life from the Loam
14% of 22 decks +10% synergy
Finale of Devastation
14% of 22 decks +5% synergy
Bala Ged Recovery
14% of 22 decks +4% synergy
Utility Artifacts
Ozolith, the Shattered Spire
33% of 12 decks +27% synergy
Skullclamp
27% of 22 decks +15% synergy
Contagion Engine
23% of 22 decks +22% synergy
Birthing Pod
23% of 22 decks +20% synergy
Contagion Clasp
18% of 22 decks +17% synergy
The Ozolith
18% of 22 decks +15% synergy
Serrated Arrows
14% of 22 decks +14% synergy
Animation Module
14% of 22 decks +13% synergy
Desecrated Tomb
14% of 22 decks +13% synergy
Blasting Station
14% of 22 decks +13% synergy
Lightning Greaves
14% of 22 decks -12% synergy
Enchantments
Abzan Ascendancy
32% of 22 decks +30% synergy
Hardened Scales
27% of 22 decks +18% synergy
Blowfly Infestation
23% of 22 decks +22% synergy
Swift Reconfiguration
23% of 22 decks +21% synergy
Anointed Procession
23% of 22 decks +14% synergy
Aura Shards
23% of 22 decks +14% synergy
Thran Vigil
21% of 19 decks +21% synergy
Promise of Bunrei
18% of 22 decks +18% synergy
Crumbling Ashes
18% of 22 decks +18% synergy
Parallel Lives
18% of 22 decks +11% synergy
Animate Dead
18% of 22 decks +9% synergy
Master Chef
14% of 21 decks +13% synergy
Fecundity
14% of 22 decks +13% synergy
Evolutionary Leap
14% of 22 decks +12% synergy
Survival of the Fittest
14% of 22 decks +12% synergy
Black Market
14% of 22 decks +9% synergy
Exquisite Blood
14% of 22 decks +9% synergy
Bastion of Remembrance
14% of 22 decks +7% synergy
Doubling Season
14% of 22 decks +5% synergy
Sylvan Library
14% of 22 decks +2% synergy
Planeswalkers
Tyvar, Jubilant Brawler
33% of 15 decks +28% synergy
Liliana, Death Wielder
14% of 22 decks +13% synergy
Utility Lands
Yavimaya, Cradle of Growth
36% of 22 decks +27% synergy
Gavony Township
32% of 22 decks +22% synergy
Urborg, Tomb of Yawgmoth
32% of 22 decks +22% synergy
Boseiju, Who Endures
27% of 22 decks +8% synergy
High Market
18% of 22 decks +15% synergy
Phyrexian Tower
18% of 22 decks +10% synergy
Bojuka Bog
18% of 22 decks -12% synergy
Field of the Dead
14% of 22 decks +10% synergy
Dryad Arbor
14% of 22 decks +9% synergy
Karn's Bastion
14% of 22 decks +9% synergy
Gaea's Cradle
14% of 22 decks +8% synergy
Reliquary Tower
14% of 22 decks -16% synergy
Mana Artifacts
Sol Ring
77% of 22 decks -7% synergy
Arcane Signet
55% of 22 decks -17% synergy
Chromatic Lantern
18% of 22 decks +9% synergy
Everflowing Chalice
14% of 22 decks +9% synergy
Golgari Signet
14% of 22 decks +1% synergy
Orzhov Signet
14% of 22 decks -14% synergy
Lands
Sacred Foundry
100% of 4 decks +64% synergy
Blood Crypt
100% of 4 decks +61% synergy
Stomping Ground
100% of 4 decks +59% synergy
Command Tower
82% of 22 decks +8% synergy
Ziatora's Proving Ground
75% of 4 decks +43% synergy
Watery Grave
67% of 6 decks +26% synergy
Indatha Triome
64% of 22 decks +32% synergy
Temple Garden
59% of 22 decks +19% synergy
Godless Shrine
59% of 22 decks +18% synergy
Overgrown Tomb
59% of 22 decks +16% synergy
Marsh Flats
55% of 22 decks +43% synergy
Verdant Catacombs
50% of 22 decks +39% synergy
Bountiful Promenade
50% of 22 decks +26% synergy
Raffine's Tower
50% of 6 decks +22% synergy
Zagoth Triome
50% of 6 decks +19% synergy
Spara's Headquarters
50% of 6 decks +18% synergy
Hallowed Fountain
50% of 6 decks +9% synergy
Breeding Pool
50% of 6 decks +9% synergy
Windswept Heath
45% of 22 decks +35% synergy
Undergrowth Stadium
41% of 22 decks +15% synergy
Exotic Orchard
41% of 22 decks +5% synergy
Sandsteppe Citadel
36% of 22 decks +11% synergy
Vault of Champions
36% of 22 decks +11% synergy
Sunpetal Grove
27% of 22 decks +4% synergy
Mana Confluence
23% of 22 decks +15% synergy
City of Brass
23% of 22 decks +15% synergy
Fabled Passage
23% of 22 decks +14% synergy
Woodland Cemetery
23% of 22 decks -5% synergy
Krosan Verge
18% of 22 decks +15% synergy
Bloodstained Mire
18% of 22 decks +8% synergy
Arid Mesa
18% of 22 decks +8% synergy
Savannah
18% of 22 decks +5% synergy
Bayou
18% of 22 decks +5% synergy
Llanowar Wastes
18% of 22 decks -7% synergy
Isolated Chapel
18% of 22 decks -9% synergy
Plaza of Heroes
14% of 21 decks +11% synergy
Horizon Canopy
14% of 22 decks +9% synergy
Murmuring Bosk
14% of 22 decks +6% synergy
Branchloft Pathway
14% of 22 decks +5% synergy
Darkbore Pathway
14% of 22 decks +5% synergy
Wooded Foothills
14% of 22 decks +3% synergy
Brightclimb Pathway
14% of 22 decks +3% synergy
Flooded Strand
14% of 22 decks +3% synergy
Misty Rainforest
14% of 22 decks +2% synergy
Scrubland
14% of 22 decks -0% synergy
Selesnya Sanctuary
14% of 22 decks -1% synergy
Terramorphic Expanse
14% of 22 decks -2% synergy
Brushland
14% of 22 decks -2% synergy
Orzhov Basilica
14% of 22 decks -2% synergy
Golgari Rot Farm
14% of 22 decks -4% synergy