Halo Fountain + Intruder Alarm + Karn, the Great Creator

Halo Fountain
Intruder Alarm
Karn, the Great Creator

Requires
Halo Fountain must be on the battlefield. Intruder Alarm must be on the battlefield. Karn, the Great Creator must be on the battlefield. Halo Fountain does not have summoning sickness. You control a creature that can tap to produce at least .
Steps
  1. Activate Karn's first loyalty ability by putting a loyalty counter on it, causing Halo Fountain to become an artifact creature until end of turn.
  2. Activate a creature you control by tapping it, adding .
  3. Activate Halo Fountain's first ability by paying , tapping and untapping it, creating a 1/1 Citizen creature token.
  4. When the Citizen enters the battlefield, Intruder Alarm triggers, untapping all creatures.
  5. Repeat from step 2.
Results
Infinite creature tokens. Infinite ETB. Infinite mana creatures you control can produce. Infinite untap of creatures.

Shorikai, Genesis Engine
0.05% of 18264 decks 9 decks
Merieke Ri Berit
0.25% of 1969 decks 5 decks
Belisarius Cawl
0.37% of 814 decks 3 decks
Urza, Prince of Kroog
0.08% of 2369 decks 2 decks
Galadriel, Light of Valinor
0.01% of 10050 decks 1 decks
Dr. Madison Li
0.02% of 5083 decks 1 decks
Phelddagrif
0.04% of 2696 decks 1 decks
Jodah, the Unifier
0.01% of 18325 decks 1 decks
Urtet, Remnant of Memnarch
0.01% of 14072 decks 1 decks
Grand Arbiter Augustin IV
0.01% of 7908 decks 1 decks
Tocasia, Dig Site Mentor
0.09% of 1110 decks 1 decks
Falco Spara, Pactweaver
0.02% of 4526 decks 1 decks
Sydri, Galvanic Genius
0.04% of 2303 decks 1 decks
High Synergy Cards
Grim Tutor
62% of 8 decks +58% synergy
Dauthi Voidwalker
62% of 8 decks +55% synergy
Heroic Intervention
83% of 6 decks +54% synergy
Urza's Saga
57% of 28 decks +50% synergy
Fabricate
54% of 28 decks +48% synergy
Unwinding Clock
46% of 28 decks +44% synergy
Entomb
50% of 8 decks +43% synergy
Ancient Den
46% of 28 decks +41% synergy
Orcish Bowmasters
50% of 8 decks +41% synergy
Dark Ritual
62% of 8 decks +40% synergy
Top Cards
Swords to Plowshares
68% of 28 decks +5% synergy
Esper Sentinel
57% of 28 decks +37% synergy
Skullclamp
46% of 28 decks +34% synergy
Mana Drain
46% of 28 decks +31% synergy
Isochron Scepter
39% of 28 decks +37% synergy
Gold Myr
39% of 28 decks +37% synergy
Silver Myr
39% of 28 decks +37% synergy
Emry, Lurker of the Loch
39% of 28 decks +35% synergy
Foundry Inspector
39% of 28 decks +35% synergy
Dramatic Reversal
39% of 28 decks +34% synergy
Game Changers
Opposition Agent
62% of 8 decks +56% synergy
Demonic Tutor
62% of 8 decks +41% synergy
Enlightened Tutor
57% of 28 decks +40% synergy
Cyclonic Rift
54% of 28 decks +27% synergy
Vampiric Tutor
50% of 8 decks +32% synergy
Rhystic Study
50% of 28 decks +23% synergy
The One Ring
29% of 28 decks +21% synergy
Mana Vault
25% of 28 decks +19% synergy
Grim Monolith
21% of 28 decks +19% synergy
Urza, Lord High Artificer
21% of 28 decks +18% synergy
Creatures
Eternal Witness
50% of 6 decks +30% synergy
Etherium Sculptor
39% of 28 decks +34% synergy
Unctus, Grand Metatect
36% of 28 decks +34% synergy
Padeem, Consul of Innovation
32% of 28 decks +29% synergy
Aphetto Alchemist
29% of 28 decks +28% synergy
Sai, Master Thopterist
29% of 28 decks +25% synergy
Fatestitcher
25% of 28 decks +24% synergy
Drumbellower
25% of 28 decks +23% synergy
Ornithopter of Paradise
25% of 28 decks +21% synergy
Urza, Lord Protector
21% of 28 decks +20% synergy
White Plume Adventurer
21% of 28 decks +20% synergy
Palladium Myr
21% of 28 decks +19% synergy
Drannith Magistrate
21% of 28 decks +15% synergy
Solemn Simulacrum
21% of 28 decks +8% synergy
Kotori, Pilot Prodigy
18% of 28 decks +16% synergy
Shimmer Myr
18% of 28 decks +16% synergy
Bronze Guardian
18% of 28 decks +16% synergy
Spellskite
18% of 28 decks +14% synergy
The Reality Chip
18% of 28 decks +14% synergy
Oswald Fiddlebender
14% of 28 decks +13% synergy
Teshar, Ancestor's Apostle
14% of 28 decks +12% synergy
Deep Gnome Terramancer
14% of 28 decks +12% synergy
Walking Ballista
14% of 28 decks +12% synergy
Thought Monitor
14% of 28 decks +11% synergy
Phyrexian Metamorph
14% of 28 decks +7% synergy
Mondrak, Glory Dominus
14% of 28 decks +6% synergy
Sun Titan
14% of 28 decks +5% synergy
Karn, Legacy Reforged
12% of 26 decks +11% synergy
Alloy Myr
11% of 28 decks +10% synergy
Vedalken Engineer
11% of 28 decks +10% synergy
Stenn, Paranoid Partisan
11% of 28 decks +9% synergy
Master Transmuter
11% of 28 decks +9% synergy
Myr Retriever
11% of 28 decks +9% synergy
Shimmer Dragon
11% of 28 decks +9% synergy
Kappa Cannoneer
11% of 28 decks +8% synergy
Urza, Prince of Kroog
11% of 28 decks +8% synergy
Angel of the Ruins
11% of 28 decks +8% synergy
Thassa's Oracle
11% of 28 decks +4% synergy
Instants
Path to Exile
39% of 28 decks -7% synergy
Teferi's Protection
36% of 28 decks +16% synergy
Force of Will
29% of 28 decks +18% synergy
Swan Song
29% of 28 decks +12% synergy
Counterspell
29% of 28 decks -14% synergy
Consign to Memory
27% of 11 decks +27% synergy
Force of Negation
25% of 28 decks +16% synergy
Fierce Guardianship
25% of 28 decks +7% synergy
Dovin's Veto
25% of 28 decks +7% synergy
Generous Gift
25% of 28 decks +0% synergy
Dispatch
21% of 28 decks +17% synergy
Stifle
18% of 28 decks +17% synergy
Intuition
18% of 28 decks +16% synergy
Whir of Invention
18% of 28 decks +15% synergy
Mindbreak Trap
18% of 28 decks +13% synergy
Flusterstorm
18% of 28 decks +11% synergy
Arcane Denial
18% of 28 decks -2% synergy
An Offer You Can't Refuse
18% of 28 decks -3% synergy
Crush Contraband
14% of 28 decks +13% synergy
Banishing Knack
11% of 28 decks +10% synergy
Narset's Reversal
11% of 28 decks +7% synergy
Sorceries
Organic Extinction
29% of 28 decks +26% synergy
Sevinne's Reclamation
29% of 28 decks +21% synergy
Dance of the Manse
25% of 28 decks +21% synergy
Brilliant Restoration
21% of 28 decks +19% synergy
Transmute Artifact
18% of 28 decks +17% synergy
Steelshaper's Gift
18% of 28 decks +15% synergy
Farewell
18% of 28 decks +5% synergy
Supreme Verdict
18% of 28 decks +4% synergy
Thoughtcast
14% of 28 decks +11% synergy
Fractured Identity
11% of 28 decks +9% synergy
Approach of the Second Sun
11% of 28 decks +7% synergy
Windfall
11% of 28 decks -2% synergy
Utility Artifacts
Thousand-Year Elixir
36% of 28 decks +34% synergy
Manifold Key
32% of 28 decks +31% synergy
Lightning Greaves
32% of 28 decks +7% synergy
Lavaspur Boots
29% of 17 decks +28% synergy
Mycosynth Lattice
29% of 28 decks +28% synergy
Voltaic Key
29% of 28 decks +28% synergy
Rings of Brighthearth
29% of 28 decks +27% synergy
Staff of Domination
29% of 28 decks +27% synergy
Mystic Forge
29% of 28 decks +26% synergy
Ashnod's Altar
29% of 28 decks +21% synergy
Illusionist's Bracers
25% of 28 decks +24% synergy
Darksteel Forge
25% of 28 decks +24% synergy
Sculpting Steel
25% of 28 decks +23% synergy
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19% of 26 decks +18% synergy
Cursed Scroll
18% of 28 decks +18% synergy
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18% of 28 decks +17% synergy
Encroaching Mycosynth
18% of 28 decks +17% synergy
Parhelion II
18% of 28 decks +16% synergy
Cloud Key
18% of 28 decks +16% synergy
Sensei's Divining Top
18% of 28 decks +13% synergy
Mind Stone
18% of 28 decks +1% synergy
Thunderhawk Gunship
14% of 28 decks +14% synergy
Skysovereign, Consul Flagship
14% of 28 decks +14% synergy
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14% of 28 decks +13% synergy
Smuggler's Copter
14% of 28 decks +13% synergy
Peacewalker Colossus
14% of 28 decks +13% synergy
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14% of 28 decks +13% synergy
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14% of 28 decks +12% synergy
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14% of 28 decks +10% synergy
The Millennium Calendar
13% of 23 decks +12% synergy
Clock of Omens
11% of 28 decks +10% synergy
Mirage Mirror
11% of 28 decks +9% synergy
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11% of 28 decks +9% synergy
Aetherflux Reservoir
11% of 28 decks +7% synergy
Commander's Sphere
11% of 28 decks -4% synergy
Swiftfoot Boots
11% of 28 decks -17% synergy
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Cryptolith Rite
50% of 6 decks +47% synergy
Doubling Season
50% of 6 decks +40% synergy
Smothering Tithe
36% of 28 decks +12% synergy
Mystic Remora
29% of 28 decks +11% synergy
Anointed Procession
25% of 28 decks +16% synergy
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18% of 28 decks +16% synergy
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18% of 28 decks +6% synergy
Mind Over Matter
14% of 28 decks +14% synergy
Efficient Construction
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Tempered Steel
11% of 28 decks +9% synergy
Dress Down
11% of 28 decks +9% synergy
Tocasia's Welcome
11% of 28 decks +7% synergy
Ghostly Prison
11% of 28 decks -1% synergy
Planeswalkers
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21% of 28 decks +19% synergy
Tezzeret the Seeker
21% of 28 decks +19% synergy
Tezzeret, Betrayer of Flesh
18% of 28 decks +17% synergy
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14% of 28 decks +10% synergy
Teferi, Time Raveler
14% of 28 decks +8% synergy
Utility Lands
Academy Ruins
43% of 28 decks +38% synergy
Seat of the Synod
43% of 28 decks +37% synergy
Minamo, School at Water's Edge
39% of 28 decks +35% synergy
Otawara, Soaring City
39% of 28 decks +23% synergy
Reliquary Tower
39% of 28 decks +10% synergy
Inventors' Fair
36% of 28 decks +32% synergy
Buried Ruin
32% of 28 decks +27% synergy
Darksteel Citadel
29% of 28 decks +25% synergy
Archway of Innovation
27% of 11 decks +24% synergy
Ancient Tomb
25% of 28 decks +15% synergy
Scorched Ruins
21% of 28 decks +21% synergy
Lotus Vale
18% of 28 decks +18% synergy
Lotus Field
18% of 28 decks +17% synergy
Mech Hangar
14% of 28 decks +14% synergy
Mystic Sanctuary
14% of 28 decks +3% synergy
Urza's Workshop
11% of 28 decks +10% synergy
Celestial Colonnade
11% of 28 decks +9% synergy
Urza's Power Plant
11% of 28 decks +9% synergy
Urza's Mine
11% of 28 decks +9% synergy
Urza's Tower
11% of 28 decks +9% synergy
Yavimaya, Cradle of Growth
11% of 28 decks +2% synergy
Mana Artifacts
Sol Ring
100% of 28 decks +16% synergy
Arcane Signet
96% of 28 decks +24% synergy
Talisman of Hierarchy
75% of 8 decks +50% synergy
Talisman of Dominance
62% of 8 decks +30% synergy
Talisman of Progress
54% of 28 decks +30% synergy
Fellwar Stone
36% of 28 decks +15% synergy
Azorius Signet
36% of 28 decks +10% synergy
Basalt Monolith
32% of 28 decks +29% synergy
Mox Opal
29% of 28 decks +24% synergy
Mana Crypt
25% of 28 decks +18% synergy
Liquimetal Torque
21% of 28 decks +18% synergy
Thought Vessel
21% of 28 decks +4% synergy
Cultivator's Caravan
18% of 28 decks +17% synergy
Chrome Mox
18% of 28 decks +12% synergy
Chromatic Lantern
18% of 28 decks +8% synergy
Gilded Lotus
14% of 28 decks +11% synergy
Mox Diamond
14% of 28 decks +10% synergy
Thran Dynamo
14% of 28 decks +9% synergy
Sonic Screwdriver
13% of 23 decks +12% synergy
Decanter of Endless Water
11% of 28 decks +6% synergy
Lands
Command Tower
89% of 28 decks +15% synergy
Breeding Pool
83% of 6 decks +43% synergy
Vault of Champions
75% of 8 decks +49% synergy
Morphic Pool
75% of 8 decks +49% synergy
Hallowed Fountain
75% of 28 decks +35% synergy
Godless Shrine
75% of 8 decks +35% synergy
Watery Grave
75% of 8 decks +35% synergy
Temple Garden
67% of 6 decks +27% synergy
Scrubland
62% of 8 decks +49% synergy
Underground Sea
62% of 8 decks +48% synergy
Sea of Clouds
54% of 28 decks +28% synergy
Prairie Stream
54% of 28 decks +20% synergy
Rejuvenating Springs
50% of 6 decks +22% synergy
Exotic Orchard
50% of 28 decks +14% synergy
Flooded Strand
46% of 28 decks +36% synergy
Razortide Bridge
43% of 28 decks +36% synergy
Tundra
39% of 28 decks +25% synergy
Glacial Fortress
36% of 28 decks +8% synergy
Misty Rainforest
32% of 28 decks +21% synergy
Nimbus Maze
29% of 28 decks +24% synergy
Windswept Heath
29% of 28 decks +18% synergy
Spire of Industry
21% of 28 decks +18% synergy
Cavern of Souls
21% of 28 decks +14% synergy
Marsh Flats
21% of 28 decks +10% synergy
Polluted Delta
21% of 28 decks +10% synergy
Adarkar Wastes
21% of 28 decks +2% synergy
Gemstone Caverns
18% of 28 decks +13% synergy
Arid Mesa
18% of 28 decks +7% synergy
Bloodstained Mire
18% of 28 decks +7% synergy
Scalding Tarn
18% of 28 decks +7% synergy
Verdant Catacombs
18% of 28 decks +7% synergy
Skycloud Expanse
18% of 28 decks +5% synergy
Port Town
18% of 28 decks +2% synergy
Deserted Beach
18% of 28 decks +2% synergy
Temple of Enlightenment
18% of 28 decks +1% synergy
The Mycosynth Gardens
14% of 28 decks +12% synergy
Irrigated Farmland
14% of 28 decks +6% synergy
Azorius Chancery
14% of 28 decks -0% synergy
Seachrome Coast
11% of 28 decks +6% synergy