Tainted Observer + Animation Module + Crystalline Crawler + Doubling Season + Tekuthal, Inquiry Dominus
Tainted Observer
Animation Module
Crystalline Crawler
Doubling Season
Tekuthal, Inquiry Dominus
Requires
Tainted Observer must be on the battlefield.
Animation Module must be on the battlefield.
Crystalline Crawler must be on the battlefield.
Doubling Season must be on the battlefield.
Tekuthal, Inquiry Dominus must be on the battlefield.
Crystalline Crawler has at least one +1/+1 counter.
You have a way to put a +1/+1 counter on a creature you control.
Mana needed: 
Steps
- Put a +1/+1 counter on a creature you control.
- Animation Module triggers, causing you to pay
to create a 1/1 Servo artifact creature token. - The Servo enters the battlefield, triggering Tainted Observer, causing you to pay
to put four +1/+1 counters on Crystalline Crawler. - Animation Module triggers four times.
- Resolve the first three Animation Module triggers, choosing not to pay.
- Activate Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding .
- Resolve the final Animation Module trigger, causing you to pay to create a 1/1 Servo artifact creature token.
- Repeat from step 3.
Results
Infinite +1/+1 counters on Crystalline Crawler. Infinite colored mana. Infinite creature tokens. Infinite ETB. Infinite proliferate.
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Enchantments
Norn's Decree
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Defense of the Heart
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Cryptolith Rite
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Imprisoned in the Moon
17% of 6 decks
+13% synergy
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Leyline of Anticipation
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17% of 6 decks
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Planeswalkers
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100% of 3 decks
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Tamiyo, the Moon Sage
33% of 6 decks
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Ajani Unyielding
33% of 3 decks
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Sorin Markov
33% of 3 decks
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Ob Nixilis Reignited
33% of 3 decks
+32% synergy
Teferi, Temporal Archmage
33% of 6 decks
+32% synergy
Ashiok, Nightmare Muse
33% of 3 decks
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Vraska, Relic Seeker
33% of 3 decks
+32% synergy
Kaya, Intangible Slayer
33% of 3 decks
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Venser, the Sojourner
33% of 3 decks
+32% synergy
Kaya the Inexorable
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+31% synergy
Nissa of Shadowed Boughs
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Ajani, Sleeper Agent
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Teferi, Hero of Dominaria
33% of 3 decks
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Ashiok, Dream Render
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Tamiyo, Field Researcher
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Narset, Parter of Veils
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Teferi, Time Raveler
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Wrenn and Realmbreaker
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Jace, Architect of Thought
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Jace, Unraveler of Secrets
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Tezzeret, Artifice Master
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Nissa, Voice of Zendikar
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Ugin, the Spirit Dragon
17% of 6 decks
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Ugin, the Ineffable
17% of 6 decks
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Wrenn and Seven
17% of 6 decks
+15% synergy
Teferi, Master of Time
17% of 6 decks
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Tezzeret the Seeker
17% of 6 decks
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Jace, Wielder of Mysteries
17% of 6 decks
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Oko, Thief of Crowns
17% of 6 decks
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Utility Lands
Drannith Ruins
100% of 1 decks
+99% synergy
Saltcrusted Steppe
67% of 3 decks
+66% synergy
Dreadship Reef
67% of 3 decks
+66% synergy
Llanowar Reborn
50% of 6 decks
+48% synergy
Calciform Pools
33% of 3 decks
+33% synergy
Inkmoth Nexus
33% of 6 decks
+33% synergy
Oran-Rief, the Vastwood
33% of 6 decks
+28% synergy
Yavimaya, Cradle of Growth
33% of 6 decks
+24% synergy
Reliquary Tower
33% of 6 decks
+4% synergy
Interplanar Beacon
17% of 6 decks
+16% synergy
Blast Zone
17% of 6 decks
+15% synergy
Nesting Grounds
17% of 6 decks
+15% synergy
Tyrite Sanctum
17% of 6 decks
+15% synergy
Alchemist's Refuge
17% of 6 decks
+10% synergy
Temple of the False God
17% of 6 decks
+7% synergy
Mosswort Bridge
17% of 6 decks
+6% synergy
Mystic Sanctuary
17% of 6 decks
+4% synergy
Rogue's Passage
17% of 6 decks
-3% synergy
Boseiju, Who Endures
17% of 6 decks
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Mana Artifacts
Sol Ring
67% of 6 decks
-18% synergy
Everflowing Chalice
50% of 6 decks
+45% synergy
Gemstone Array
33% of 6 decks
+33% synergy
Staff of Compleation
33% of 6 decks
+32% synergy
Pentad Prism
17% of 6 decks
+16% synergy
Empowered Autogenerator
17% of 6 decks
+16% synergy
Component Pouch
17% of 6 decks
+16% synergy
Coalition Relic
17% of 6 decks
+16% synergy
Paradise Mantle
17% of 6 decks
+16% synergy
Glistening Sphere
17% of 6 decks
+15% synergy
Replicating Ring
17% of 6 decks
+15% synergy
Mana Vault
17% of 6 decks
+10% synergy
Mana Crypt
17% of 6 decks
+8% synergy
Chromatic Lantern
17% of 6 decks
+7% synergy
Talisman of Curiosity
17% of 6 decks
+4% synergy
Simic Signet
17% of 6 decks
+2% synergy
Thought Vessel
17% of 6 decks
-0% synergy
Arcane Signet
17% of 6 decks
-55% synergy
Lands
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100% of 3 decks
+59% synergy
Godless Shrine
100% of 3 decks
+59% synergy
Overgrown Tomb
100% of 3 decks
+57% synergy
Breeding Pool
83% of 6 decks
+42% synergy
Command Tower
83% of 6 decks
+9% synergy
Bountiful Promenade
67% of 3 decks
+42% synergy
Spara's Headquarters
67% of 3 decks
+35% synergy
Watery Grave
67% of 3 decks
+26% synergy
Hallowed Fountain
67% of 3 decks
+26% synergy
Windswept Heath
50% of 6 decks
+40% synergy
Polluted Delta
50% of 6 decks
+39% synergy
Exotic Orchard
50% of 6 decks
+14% synergy
City of Brass
33% of 6 decks
+25% synergy
Flooded Strand
33% of 6 decks
+23% synergy
Marsh Flats
33% of 6 decks
+22% synergy
Verdant Catacombs
33% of 6 decks
+22% synergy
Misty Rainforest
33% of 6 decks
+22% synergy
Savannah
33% of 3 decks
+20% synergy
Bayou
33% of 3 decks
+20% synergy
Scrubland
33% of 3 decks
+20% synergy
Tundra
33% of 3 decks
+19% synergy
Selesnya Sanctuary
33% of 3 decks
+19% synergy
Underground Sea
33% of 3 decks
+19% synergy
Azorius Chancery
33% of 3 decks
+19% synergy
Overgrown Farmland
33% of 3 decks
+17% synergy
Dimir Aqueduct
33% of 3 decks
+16% synergy
Simic Growth Chamber
33% of 6 decks
+14% synergy
Vault of Champions
33% of 3 decks
+8% synergy
Sea of Clouds
33% of 3 decks
+7% synergy
Morphic Pool
33% of 3 decks
+7% synergy
Undergrowth Stadium
33% of 3 decks
+7% synergy
Hinterland Harbor
33% of 6 decks
+6% synergy
Raffine's Tower
33% of 3 decks
+5% synergy
Rejuvenating Springs
33% of 6 decks
+5% synergy
Zagoth Triome
33% of 3 decks
+3% synergy
Prairie Stream
33% of 3 decks
-0% synergy
Gemstone Mine
17% of 6 decks
+16% synergy
Vivid Creek
17% of 6 decks
+15% synergy
Vivid Grove
17% of 6 decks
+15% synergy
Littjara Mirrorlake
17% of 6 decks
+15% synergy
Opal Palace
17% of 6 decks
+14% synergy
Plaza of Heroes
17% of 6 decks
+13% synergy
Botanical Sanctum
17% of 6 decks
+13% synergy
Reflecting Pool
17% of 6 decks
+11% synergy
Mana Confluence
17% of 6 decks
+9% synergy
Waterlogged Grove
17% of 6 decks
+9% synergy
Fabled Passage
17% of 6 decks
+7% synergy
Wooded Foothills
17% of 6 decks
+7% synergy
Vineglimmer Snarl
17% of 6 decks
+6% synergy
Bloodstained Mire
17% of 6 decks
+6% synergy