Cathars' Crusade + Nest of Scarabs + Devoted Druid

Cathars' Crusade
Nest of Scarabs
Devoted Druid

Requires
Cathars' Crusade must be on the battlefield. Nest of Scarabs 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's first ability by tapping it, adding g.
  2. Activate Devoted Druid's second ability by putting a -1/-1 counter on it.
  3. Nest of Scarabs triggers, creating a 1/1 Insect creature token.
  4. The Insect enters the battlefield, triggering Cathars' Crusade, putting a +1/+1 counter on each creature you control.
  5. Resolve the Devoted Druid ability from step 2, untapping it.
  6. Repeat.
Results
Infinite +1/+1 counters on all creatures you control except Devoted Druid. Infinite creature tokens. Infinite ETB. Infinite green mana.

Top Commanders (2)
Tayam, Luminous Enigma
0.08% of 4979 decks 4 decks
Atraxa, Praetors' Voice
0.01% of 32950 decks 4 decks
Top Cards (10)
Hapatra, Vizier of Poisons
64% of 14 decks +64% synergy
Obelisk Spider
57% of 14 decks +57% synergy
Flourishing Defenses
50% of 14 decks +50% synergy
Swords to Plowshares
50% of 14 decks +22% synergy
Blowfly Infestation
43% of 14 decks +43% synergy
Necroskitter
43% of 14 decks +43% synergy
Eerie Ultimatum
43% of 14 decks +41% synergy
Yawgmoth, Thran Physician
43% of 14 decks +41% synergy
Ashnod's Altar
43% of 14 decks +35% synergy
Nature's Lore
43% of 14 decks +28% synergy
Creatures (40)
Tekuthal, Inquiry Dominus
100% of 3 decks +98% synergy
Toxrill, the Corrosive
60% of 5 decks +59% synergy
Heartmender
36% of 14 decks +36% synergy
Quillspike
36% of 14 decks +36% synergy
Kitchen Finks
36% of 14 decks +36% synergy
Vizier of Remedies
36% of 14 decks +36% synergy
Mikaeus, the Unhallowed
36% of 14 decks +34% synergy
Viscera Seer
36% of 14 decks +30% synergy
Zulaport Cutthroat
36% of 14 decks +30% synergy
Blood Artist
36% of 14 decks +30% synergy
Harbinger of Night
29% of 14 decks +29% synergy
Dusk Urchins
29% of 14 decks +28% synergy
Ghave, Guru of Spores
29% of 14 decks +28% synergy
Midnight Banshee
29% of 14 decks +28% synergy
Anafenza, Kin-Tree Spirit
29% of 14 decks +28% synergy
Ivy Lane Denizen
29% of 14 decks +28% synergy
Winding Constrictor
29% of 14 decks +28% synergy
Fertilid
29% of 14 decks +27% synergy
Carrion Feeder
29% of 14 decks +26% synergy
Champion of Lambholt
29% of 14 decks +25% synergy
Birds of Paradise
29% of 14 decks +16% synergy
Barrenton Medic
21% of 14 decks +21% synergy
Cinderhaze Wretch
21% of 14 decks +21% synergy
Soul Snuffers
21% of 14 decks +21% synergy
Carnifex Demon
21% of 14 decks +21% synergy
Young Wolf
21% of 14 decks +21% synergy
Wickerbough Elder
21% of 14 decks +21% synergy
Putrid Goblin
21% of 14 decks +21% synergy
Generous Patron
21% of 14 decks +21% synergy
Wall of Roots
21% of 14 decks +21% synergy
Good-Fortune Unicorn
21% of 14 decks +21% synergy
Trostani, Selesnya's Voice
21% of 14 decks +21% synergy
Woodfall Primus
21% of 14 decks +21% synergy
Puppeteer Clique
21% of 14 decks +21% synergy
Spore Frog
21% of 14 decks +20% synergy
Incubation Druid
21% of 14 decks +19% synergy
Deathrite Shaman
21% of 14 decks +19% synergy
Evolution Sage
21% of 14 decks +18% synergy
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21% of 14 decks +12% synergy
Eternal Witness
21% of 14 decks +11% synergy
Instants (7)
Assassin's Trophy
36% of 14 decks +30% synergy
Path to Exile
36% of 14 decks +16% synergy
Enlightened Tutor
29% of 14 decks +20% synergy
Beast Within
29% of 14 decks +10% synergy
Grim Affliction
21% of 14 decks +21% synergy
Eladamri's Call
21% of 14 decks +19% synergy
Heroic Intervention
21% of 14 decks +8% synergy
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43% of 14 decks +27% synergy
Cultivate
43% of 14 decks +21% synergy
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36% of 14 decks +24% synergy
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36% of 14 decks +19% synergy
Grind // Dust
29% of 14 decks +29% synergy
Incremental Blight
29% of 14 decks +28% synergy
Black Sun's Zenith
29% of 14 decks +28% synergy
Diabolic Tutor
29% of 14 decks +25% synergy
Demonic Tutor
29% of 14 decks +16% synergy
Kodama's Reach
29% of 14 decks +13% synergy
Utility Artifacts (7)
Contagion Engine
36% of 14 decks +35% synergy
Skullclamp
36% of 14 decks +23% synergy
Cauldron of Souls
21% of 14 decks +21% synergy
Contagion Clasp
21% of 14 decks +20% synergy
Altar of Dementia
21% of 14 decks +18% synergy
The Ozolith
21% of 14 decks +18% synergy
Lightning Greaves
21% of 14 decks -4% synergy
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Inexorable Tide
60% of 5 decks +59% synergy
Doubling Season
36% of 14 decks +32% synergy
Crumbling Ashes
29% of 14 decks +28% synergy
Black Market
29% of 14 decks +26% synergy
Anointed Procession
29% of 14 decks +24% synergy
Animate Dead
29% of 14 decks +24% synergy
Abzan Ascendancy
21% of 14 decks +21% synergy
Swift Reconfiguration
21% of 14 decks +21% synergy
Parallel Lives
21% of 14 decks +18% synergy
Planeswalkers (1)
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21% of 14 decks +21% synergy
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Karn's Bastion
29% of 14 decks +23% synergy
Yavimaya, Cradle of Growth
29% of 14 decks +19% synergy
Urborg, Tomb of Yawgmoth
29% of 14 decks +18% synergy
Bojuka Bog
29% of 14 decks +13% synergy
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29% of 14 decks -0% synergy
Gavony Township
21% of 14 decks +19% synergy
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Sol Ring
79% of 14 decks -6% synergy
Arcane Signet
71% of 14 decks +1% synergy
Orzhov Signet
29% of 14 decks +22% synergy
Chromatic Lantern
29% of 14 decks +19% synergy
Selesnya Signet
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Golgari Signet
21% of 14 decks +19% synergy
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100% of 14 decks +27% synergy
Watery Grave
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Zagoth Triome
60% of 5 decks +56% synergy
Raffine's Tower
60% of 5 decks +56% synergy
Spara's Headquarters
60% of 5 decks +56% synergy
Hallowed Fountain
60% of 5 decks +51% synergy
Breeding Pool
60% of 5 decks +51% synergy
Indatha Triome
57% of 14 decks +54% synergy
Temple Garden
50% of 14 decks +41% synergy
Overgrown Tomb
50% of 14 decks +41% synergy
Sandsteppe Citadel
43% of 14 decks +40% synergy
Sunpetal Grove
43% of 14 decks +38% synergy
Bountiful Promenade
43% of 14 decks +38% synergy
Woodland Cemetery
43% of 14 decks +37% synergy
Isolated Chapel
43% of 14 decks +37% synergy
Godless Shrine
43% of 14 decks +33% synergy
Undergrowth Stadium
36% of 14 decks +30% synergy
Vault of Champions
36% of 14 decks +30% synergy
Canopy Vista
36% of 14 decks +28% synergy
Verdant Catacombs
36% of 14 decks +24% synergy
Exotic Orchard
36% of 14 decks +1% synergy
Deathcap Glade
29% of 14 decks +25% synergy
Shattered Sanctum
29% of 14 decks +25% synergy
Overgrown Farmland
29% of 14 decks +25% synergy
Marsh Flats
29% of 14 decks +17% synergy
Evolving Wilds
29% of 14 decks +7% synergy
Windswept Heath
21% of 14 decks +11% synergy
Terramorphic Expanse
21% of 14 decks +6% synergy