Halo Fountain + Intruder Alarm + Karn, Silver Golem
Halo Fountain
Intruder Alarm
Karn, Silver Golem
Requires
Halo Fountain must be on the battlefield.
Intruder Alarm must be on the battlefield.
Karn, Silver Golem must be on the battlefield.
Halo Fountain does not have summoning sickness.
You control a creature that can tap to produce at least .
Mana needed: 
Steps
- Activate Karn by paying , causing Halo Fountain to become an artifact creature until end of turn.
- Activate a creature you control by tapping it, adding .
- Activate Halo Fountain's first ability by paying , tapping and untapping it, creating a 1/1 Citizen creature token.
- When the Citizen enters the battlefield, Intruder Alarm triggers, untapping all creatures.
- Repeat from step 2.
Results
Infinite creature tokens. Infinite ETB. Infinite mana creatures you control can produce. Infinite untap of all creatures.
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20% of 5 decks
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Aura of Dominion
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Mind Over Matter
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+16% synergy
Arcane Adaptation
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Swift Reconfiguration
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Thopter Spy Network
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Leyline of Anticipation
17% of 6 decks
+12% synergy
Intangible Virtue
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Anointed Procession
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Rhystic Study
17% of 6 decks
-11% synergy
Planeswalkers
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50% of 2 decks
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Tezzeret, Master of the Bridge
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Karn, the Great Creator
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Venser, the Sojourner
17% of 6 decks
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Teferi, Hero of Dominaria
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Teferi, Who Slows the Sunset
17% of 6 decks
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Tezzeret the Seeker
17% of 6 decks
+14% synergy
Elspeth, Sun's Champion
17% of 6 decks
+12% synergy
Teferi, Time Raveler
17% of 6 decks
+10% synergy
Utility Lands
Fomori Vault
50% of 2 decks
+48% synergy
Archway of Innovation
50% of 2 decks
+45% synergy
Alchemist's Refuge
50% of 2 decks
+43% synergy
Reliquary Tower
50% of 6 decks
+21% synergy
Lotus Field
33% of 6 decks
+32% synergy
Inventors' Fair
33% of 6 decks
+29% synergy
Nykthos, Shrine to Nyx
33% of 6 decks
+28% synergy
Temple of the False God
33% of 6 decks
+24% synergy
Lotus Vale
17% of 6 decks
+16% synergy
Mishra's Workshop
17% of 6 decks
+16% synergy
Mech Hangar
17% of 6 decks
+16% synergy
Detection Tower
17% of 6 decks
+16% synergy
Cascading Cataracts
17% of 6 decks
+15% synergy
Celestial Colonnade
17% of 6 decks
+15% synergy
Maze of Ith
17% of 6 decks
+14% synergy
Strip Mine
17% of 6 decks
+14% synergy
Minamo, School at Water's Edge
17% of 6 decks
+12% synergy
Command Beacon
17% of 6 decks
+12% synergy
Academy Ruins
17% of 6 decks
+12% synergy
Ancient Den
17% of 6 decks
+11% synergy
Urza's Saga
17% of 6 decks
+9% synergy
Yavimaya, Cradle of Growth
17% of 6 decks
+7% synergy
Urborg, Tomb of Yawgmoth
17% of 6 decks
+7% synergy
Ancient Tomb
17% of 6 decks
+6% synergy
Mana Artifacts
Sol Ring
100% of 6 decks
+16% synergy
Arcane Signet
67% of 6 decks
-5% synergy
Fabrication Foundry
50% of 2 decks
+49% synergy
Chromatic Orrery
50% of 6 decks
+48% synergy
Talisman of Hierarchy
50% of 2 decks
+25% synergy
Azorius Signet
50% of 6 decks
+24% synergy
Orzhov Signet
50% of 2 decks
+23% synergy
Dimir Signet
50% of 2 decks
+20% synergy
Sonic Screwdriver
33% of 3 decks
+32% synergy
Basalt Monolith
33% of 6 decks
+31% synergy
Gilded Lotus
33% of 6 decks
+30% synergy
Thran Dynamo
33% of 6 decks
+28% synergy
The Mightstone and Weakstone
20% of 5 decks
+19% synergy
Machine God's Effigy
20% of 5 decks
+19% synergy
Relic of Legends
20% of 5 decks
+18% synergy
Empowered Autogenerator
17% of 6 decks
+16% synergy
Dreamstone Hedron
17% of 6 decks
+16% synergy
Grim Monolith
17% of 6 decks
+15% synergy
Hedron Archive
17% of 6 decks
+14% synergy
Liquimetal Torque
17% of 6 decks
+13% synergy
Mox Amber
17% of 6 decks
+12% synergy
Marble Diamond
17% of 6 decks
+12% synergy
Mox Diamond
17% of 6 decks
+12% synergy
Mox Opal
17% of 6 decks
+12% synergy
Sky Diamond
17% of 6 decks
+12% synergy
Jeweled Lotus
17% of 6 decks
+10% synergy
Mana Vault
17% of 6 decks
+10% synergy
Chromatic Lantern
17% of 6 decks
+7% synergy
Fellwar Stone
17% of 6 decks
-4% synergy
Lands
Bountiful Promenade
100% of 2 decks
+76% synergy
Spire Garden
100% of 1 decks
+76% synergy
Spectator Seating
100% of 1 decks
+75% synergy
Vault of Champions
100% of 2 decks
+74% synergy
Morphic Pool
100% of 2 decks
+74% synergy
Undergrowth Stadium
100% of 1 decks
+74% synergy
Luxury Suite
100% of 1 decks
+74% synergy
Training Center
100% of 1 decks
+73% synergy
Rejuvenating Springs
100% of 2 decks
+71% synergy
The World Tree
100% of 1 decks
+66% synergy
Sacred Foundry
100% of 1 decks
+64% synergy
Blood Crypt
100% of 1 decks
+61% synergy
Steam Vents
100% of 1 decks
+61% synergy
Godless Shrine
100% of 2 decks
+59% synergy
Watery Grave
100% of 2 decks
+59% synergy
Stomping Ground
100% of 1 decks
+59% synergy
Overgrown Tomb
100% of 1 decks
+57% synergy
Command Tower
100% of 6 decks
+26% synergy
Sea of Clouds
83% of 6 decks
+57% synergy
Sunken Ruins
50% of 2 decks
+45% synergy
Fetid Heath
50% of 2 decks
+39% synergy
Selesnya Sanctuary
50% of 2 decks
+36% synergy
Brushland
50% of 2 decks
+34% synergy
Simic Growth Chamber
50% of 2 decks
+30% synergy
Seaside Citadel
50% of 2 decks
+24% synergy
Yavimaya Coast
50% of 2 decks
+24% synergy
Arcane Sanctum
50% of 2 decks
+22% synergy
Raffine's Tower
50% of 2 decks
+22% synergy
Spara's Headquarters
50% of 2 decks
+18% synergy
Exotic Orchard
50% of 6 decks
+14% synergy
Temple Garden
50% of 2 decks
+9% synergy
Hallowed Fountain
50% of 6 decks
+9% synergy
Breeding Pool
50% of 2 decks
+9% synergy
Spire of Industry
33% of 6 decks
+30% synergy
Flooded Strand
33% of 6 decks
+23% synergy
Tundra
33% of 6 decks
+19% synergy
Azorius Chancery
33% of 6 decks
+19% synergy
Prairie Stream
33% of 6 decks
-0% synergy
Holdout Settlement
17% of 6 decks
+16% synergy
Survivors' Encampment
17% of 6 decks
+16% synergy
Forbidden Orchard
17% of 6 decks
+14% synergy
Gemstone Caverns
17% of 6 decks
+12% synergy
Nimbus Maze
17% of 6 decks
+12% synergy
Mystic Gate
17% of 6 decks
+11% synergy
Cavern of Souls
17% of 6 decks
+10% synergy
Mana Confluence
17% of 6 decks
+9% synergy
Hengegate Pathway
17% of 6 decks
+9% synergy
City of Brass
17% of 6 decks
+8% synergy
Polluted Delta
17% of 6 decks
+5% synergy
Marsh Flats
17% of 6 decks
+5% synergy