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 all creatures.

Shorikai, Genesis Engine
0.06% of 17305 decks 10 decks
Merieke Ri Berit
0.27% of 1826 decks 5 decks
Tocasia, Dig Site Mentor
0.16% of 1255 decks 2 decks
Sydri, Galvanic Genius
0.09% of 2178 decks 2 decks
Belisarius Cawl
0.26% of 767 decks 2 decks
Urza, Prince of Kroog
0.07% of 2765 decks 2 decks
Kwain, Itinerant Meddler
0.02% of 5138 decks 1 decks
Grand Arbiter Augustin IV
0.01% of 7079 decks 1 decks
Phelddagrif
0.04% of 2599 decks 1 decks
Falco Spara, Pactweaver
0.02% of 4627 decks 1 decks
Urtet, Remnant of Memnarch
0.01% of 14085 decks 1 decks
Dr. Madison Li
0.03% of 3959 decks 1 decks
Jodah, the Unifier
0.01% of 18391 decks 1 decks
High Synergy Cards
Opposition Agent
56% of 9 decks +48% synergy
Dauthi Voidwalker
56% of 9 decks +47% synergy
Lavaspur Boots
45% of 11 decks +43% synergy
Ancient Den
47% of 30 decks +41% synergy
Unwinding Clock
43% of 30 decks +41% synergy
Unctus, Grand Metatect
42% of 24 decks +40% synergy
Urza's Saga
47% of 30 decks +39% synergy
Emry, Lurker of the Loch
43% of 30 decks +39% synergy
Orcish Bowmasters
50% of 8 decks +39% synergy
Dramatic Reversal
43% of 30 decks +38% synergy
Top Cards
Heroic Intervention
67% of 6 decks +37% synergy
Swords to Plowshares
67% of 30 decks +4% synergy
Dark Ritual
56% of 9 decks +33% synergy
Esper Sentinel
50% of 30 decks +29% synergy
Enlightened Tutor
47% of 30 decks +29% synergy
Cyclonic Rift
47% of 30 decks +19% synergy
Entomb
44% of 9 decks +37% synergy
Fabricate
43% of 30 decks +37% synergy
Rhystic Study
43% of 30 decks +15% synergy
Path to Exile
43% of 30 decks -2% synergy
Creatures
Gold Myr
40% of 30 decks +37% synergy
Drumbellower
37% of 30 decks +34% synergy
Silver Myr
37% of 30 decks +34% synergy
Etherium Sculptor
37% of 30 decks +31% synergy
Foundry Inspector
33% of 30 decks +29% synergy
White Plume Adventurer
32% of 28 decks +31% synergy
Fatestitcher
30% of 30 decks +29% synergy
Aphetto Alchemist
30% of 30 decks +29% synergy
Palladium Myr
27% of 30 decks +25% synergy
Padeem, Consul of Innovation
27% of 30 decks +23% synergy
Sai, Master Thopterist
27% of 30 decks +23% synergy
Ornithopter of Paradise
27% of 30 decks +22% synergy
Urza, Lord Protector
26% of 27 decks +24% synergy
Drannith Magistrate
20% of 30 decks +13% synergy
Solemn Simulacrum
20% of 30 decks +6% synergy
Kotori, Pilot Prodigy
17% of 30 decks +15% synergy
Oswald Fiddlebender
17% of 30 decks +15% synergy
Urza, Lord High Artificer
17% of 30 decks +14% synergy
The Reality Chip
17% of 30 decks +13% synergy
Karn, Legacy Reforged
15% of 20 decks +14% synergy
Deep Gnome Terramancer
14% of 28 decks +12% synergy
Alloy Myr
13% of 30 decks +13% synergy
Vedalken Engineer
13% of 30 decks +13% synergy
Shimmer Myr
13% of 30 decks +12% synergy
Bronze Guardian
13% of 30 decks +11% synergy
Walking Ballista
13% of 30 decks +11% synergy
Spellskite
13% of 30 decks +10% synergy
Liberator, Urza's Battlethopter
11% of 27 decks +9% synergy
Stenn, Paranoid Partisan
11% of 27 decks +9% synergy
Urza, Prince of Kroog
11% of 27 decks +8% synergy
Clever Conjurer
10% of 30 decks +10% synergy
Tameshi, Reality Architect
10% of 30 decks +9% synergy
Cosima, God of the Voyage
10% of 30 decks +9% synergy
Kuldotha Forgemaster
10% of 30 decks +9% synergy
Kelpie Guide
10% of 30 decks +9% synergy
Platinum Angel
10% of 30 decks +9% synergy
Master Transmuter
10% of 30 decks +8% synergy
Kappa Cannoneer
10% of 30 decks +8% synergy
Myr Retriever
10% of 30 decks +8% synergy
Hanna, Ship's Navigator
10% of 30 decks +8% synergy
Myr Battlesphere
10% of 30 decks +8% synergy
Teshar, Ancestor's Apostle
10% of 30 decks +8% synergy
Jin-Gitaxias, Progress Tyrant
10% of 30 decks +7% synergy
Thought Monitor
10% of 30 decks +7% synergy
Sram, Senior Edificer
10% of 30 decks +4% synergy
Phyrexian Metamorph
10% of 30 decks +3% synergy
Thassa's Oracle
10% of 30 decks +3% synergy
Sun Titan
10% of 30 decks -1% synergy
Instants
Consign to Memory
50% of 6 decks +49% synergy
Vampiric Tutor
44% of 9 decks +26% synergy
Mana Drain
40% of 30 decks +25% synergy
Counterspell
37% of 30 decks -6% synergy
Teferi's Protection
33% of 30 decks +13% synergy
Dovin's Veto
30% of 30 decks +11% synergy
Force of Will
27% of 30 decks +16% synergy
Dispatch
23% of 30 decks +18% synergy
Force of Negation
23% of 30 decks +14% synergy
Swan Song
23% of 30 decks +7% synergy
Fierce Guardianship
23% of 30 decks +5% synergy
Arcane Denial
23% of 30 decks +4% synergy
Generous Gift
23% of 30 decks -2% synergy
Crush Contraband
20% of 30 decks +18% synergy
An Offer You Can't Refuse
20% of 30 decks -0% synergy
Stifle
17% of 30 decks +16% synergy
Intuition
17% of 30 decks +15% synergy
Mindbreak Trap
17% of 30 decks +13% synergy
Flusterstorm
17% of 30 decks +10% synergy
Thirst for Knowledge
13% of 30 decks +12% synergy
Whir of Invention
13% of 30 decks +10% synergy
Negate
13% of 30 decks -9% synergy
Banishing Knack
10% of 30 decks +10% synergy
Narset's Reversal
10% of 30 decks +6% synergy
Return to Dust
10% of 30 decks +6% synergy
Sorceries
Grim Tutor
56% of 9 decks +51% synergy
Demonic Tutor
56% of 9 decks +33% synergy
Organic Extinction
30% of 30 decks +27% synergy
Dance of the Manse
30% of 30 decks +26% synergy
Sevinne's Reclamation
27% of 30 decks +19% synergy
Brilliant Restoration
23% of 30 decks +21% synergy
Transmute Artifact
17% of 30 decks +16% synergy
Steelshaper's Gift
17% of 30 decks +14% synergy
Thoughtcast
17% of 30 decks +13% synergy
Supreme Verdict
17% of 30 decks +3% synergy
Approach of the Second Sun
13% of 30 decks +10% synergy
Farewell
13% of 30 decks -0% synergy
Anchor to Reality
10% of 30 decks +9% synergy
Fractured Identity
10% of 30 decks +8% synergy
Windfall
10% of 30 decks -3% synergy
Utility Artifacts
Thousand-Year Elixir
40% of 30 decks +38% synergy
Isochron Scepter
40% of 30 decks +38% synergy
The One Ring
38% of 21 decks +29% synergy
Skullclamp
37% of 30 decks +24% synergy
Lightning Greaves
37% of 30 decks +11% synergy
Manifold Key
33% of 30 decks +32% synergy
Sting, the Glinting Dagger
31% of 16 decks +30% synergy
Rings of Brighthearth
30% of 30 decks +28% synergy
Voltaic Key
27% of 30 decks +26% synergy
Illusionist's Bracers
27% of 30 decks +25% synergy
Staff of Domination
27% of 30 decks +25% synergy
Mystic Forge
27% of 30 decks +24% synergy
Mycosynth Lattice
23% of 30 decks +22% synergy
Sculpting Steel
23% of 30 decks +21% synergy
Ashnod's Altar
23% of 30 decks +16% synergy
Encroaching Mycosynth
21% of 24 decks +20% synergy
Weatherlight
20% of 30 decks +19% synergy
The Millennium Calendar
20% of 15 decks +19% synergy
Smuggler's Copter
20% of 30 decks +19% synergy
Darksteel Forge
20% of 30 decks +19% synergy
Cursed Scroll
17% of 30 decks +17% synergy
Skysovereign, Consul Flagship
17% of 30 decks +16% synergy
Mobilizer Mech
17% of 30 decks +16% synergy
Peacewalker Colossus
17% of 30 decks +16% synergy
Parhelion II
17% of 30 decks +15% synergy
Cloud Key
17% of 30 decks +15% synergy
Shorikai, Genesis Engine
17% of 30 decks +14% synergy
Sensei's Divining Top
17% of 30 decks +11% synergy
Thunderhawk Gunship
15% of 27 decks +14% synergy
Swiftfoot Boots
13% of 30 decks -14% synergy
Portal to Phyrexia
11% of 27 decks +9% synergy
Nautiloid Ship
11% of 28 decks +10% synergy
Unbender Tine
10% of 30 decks +10% synergy
Imperial Recovery Unit
10% of 30 decks +10% synergy
Unlicensed Hearse
10% of 30 decks +10% synergy
Aerial Surveyor
10% of 30 decks +9% synergy
Clock of Omens
10% of 30 decks +9% synergy
Nevinyrral's Disk
10% of 30 decks +9% synergy
Mirage Mirror
10% of 30 decks +8% synergy
Imposter Mech
10% of 30 decks +8% synergy
Aetherflux Reservoir
10% of 30 decks +6% synergy
Enchantments
Smothering Tithe
30% of 30 decks +5% synergy
Mystic Remora
23% of 30 decks +5% synergy
Mirrodin Besieged
20% of 30 decks +18% synergy
Anointed Procession
17% of 30 decks +8% synergy
Mind Over Matter
13% of 30 decks +13% synergy
Efficient Construction
13% of 30 decks +12% synergy
Propaganda
13% of 30 decks +2% synergy
Artificer Class
11% of 28 decks +10% synergy
Tempered Steel
10% of 30 decks +8% synergy
Dress Down
10% of 30 decks +8% synergy
Freed from the Real
10% of 30 decks +8% synergy
Mechanized Production
10% of 30 decks +7% synergy
Planeswalkers
Tezzeret, Betrayer of Flesh
30% of 30 decks +29% synergy
Teferi, Who Slows the Sunset
27% of 30 decks +24% synergy
Tezzeret the Seeker
20% of 30 decks +17% synergy
Narset, Parter of Veils
13% of 30 decks +8% synergy
Karn, Living Legacy
11% of 27 decks +11% synergy
Teferi, Time Raveler
10% of 30 decks +3% synergy
Utility Lands
Seat of the Synod
43% of 30 decks +37% synergy
Minamo, School at Water's Edge
37% of 30 decks +32% synergy
Academy Ruins
37% of 30 decks +32% synergy
Otawara, Soaring City
37% of 30 decks +20% synergy
Reliquary Tower
37% of 30 decks +7% synergy
Inventors' Fair
27% of 30 decks +23% synergy
Buried Ruin
27% of 30 decks +21% synergy
Darksteel Citadel
23% of 30 decks +19% synergy
Ancient Tomb
23% of 30 decks +13% synergy
Scorched Ruins
20% of 30 decks +20% synergy
Lotus Field
20% of 30 decks +19% synergy
Lotus Vale
17% of 30 decks +16% synergy
Mech Hangar
13% of 30 decks +13% synergy
Celestial Colonnade
13% of 30 decks +12% synergy
Mystic Sanctuary
13% of 30 decks +1% synergy
Urza's Workshop
11% of 27 decks +10% synergy
Urza's Power Plant
10% of 30 decks +8% synergy
Urza's Mine
10% of 30 decks +8% synergy
Urza's Tower
10% of 30 decks +8% synergy
Mana Artifacts
Sol Ring
100% of 30 decks +16% synergy
Arcane Signet
97% of 30 decks +25% synergy
Talisman of Hierarchy
78% of 9 decks +53% synergy
Talisman of Dominance
56% of 9 decks +24% synergy
Talisman of Progress
43% of 30 decks +21% synergy
Fellwar Stone
40% of 30 decks +19% synergy
Basalt Monolith
37% of 30 decks +34% synergy
Azorius Signet
37% of 30 decks +11% synergy
Cultivator's Caravan
23% of 30 decks +23% synergy
Gilded Lotus
23% of 30 decks +20% synergy
Mox Opal
23% of 30 decks +19% synergy
Mana Vault
23% of 30 decks +17% synergy
Mana Crypt
23% of 30 decks +14% synergy
Sonic Screwdriver
20% of 15 decks +19% synergy
Grim Monolith
20% of 30 decks +18% synergy
Liquimetal Torque
20% of 30 decks +16% synergy
Thran Dynamo
20% of 30 decks +15% synergy
Thought Vessel
20% of 30 decks +3% synergy
Chrome Mox
17% of 30 decks +10% synergy
Mind Stone
17% of 30 decks -1% synergy
Decanter of Endless Water
14% of 28 decks +9% synergy
Chromatic Orrery
13% of 30 decks +12% synergy
Mox Diamond
13% of 30 decks +9% synergy
Chromatic Lantern
13% of 30 decks +4% synergy
The Mightstone and Weakstone
11% of 27 decks +10% synergy
Machine God's Effigy
11% of 27 decks +10% synergy
Midnight Clock
10% of 30 decks +5% synergy
Commander's Sphere
10% of 30 decks -5% synergy
Lands
Command Tower
90% of 30 decks +16% synergy
Vault of Champions
78% of 9 decks +52% synergy
Morphic Pool
78% of 9 decks +52% synergy
Godless Shrine
78% of 9 decks +37% synergy
Watery Grave
78% of 9 decks +37% synergy
Hallowed Fountain
70% of 30 decks +29% synergy
Temple Garden
67% of 6 decks +26% synergy
Breeding Pool
67% of 6 decks +26% synergy
Prairie Stream
57% of 30 decks +23% synergy
Scrubland
56% of 9 decks +42% synergy
Underground Sea
56% of 9 decks +41% synergy
Sea of Clouds
53% of 30 decks +27% synergy
Exotic Orchard
50% of 30 decks +14% synergy
Canopy Vista
50% of 6 decks +14% synergy
Razortide Bridge
43% of 30 decks +36% synergy
Flooded Strand
40% of 30 decks +29% synergy
Tundra
40% of 30 decks +26% synergy
Glacial Fortress
40% of 30 decks +15% synergy
Nimbus Maze
33% of 30 decks +28% synergy
Spire of Industry
30% of 30 decks +27% synergy
Polluted Delta
23% of 30 decks +12% synergy
Marsh Flats
23% of 30 decks +12% synergy
Misty Rainforest
23% of 30 decks +12% synergy
Port Town
23% of 30 decks +8% synergy
Temple of Enlightenment
23% of 30 decks +7% synergy
Adarkar Wastes
23% of 30 decks +6% synergy
Cavern of Souls
20% of 30 decks +13% synergy
Windswept Heath
20% of 30 decks +10% synergy
Azorius Chancery
20% of 30 decks +5% synergy
Deserted Beach
20% of 30 decks +4% synergy
The Mycosynth Gardens
17% of 24 decks +14% synergy
Gemstone Caverns
17% of 30 decks +12% synergy
Irrigated Farmland
17% of 30 decks +9% synergy
Bloodstained Mire
17% of 30 decks +6% synergy
Arid Mesa
17% of 30 decks +6% synergy
Scalding Tarn
17% of 30 decks +6% synergy
Verdant Catacombs
17% of 30 decks +5% synergy
Skycloud Expanse
17% of 30 decks +4% synergy
Hengegate Pathway
13% of 30 decks +6% synergy
Evolving Wilds
13% of 30 decks -8% synergy
Idyllic Beachfront
11% of 27 decks +8% synergy
Flood Plain
10% of 30 decks +10% synergy
Glacial Floodplain
10% of 30 decks +7% synergy
Seachrome Coast
10% of 30 decks +5% synergy
Mystic Gate
10% of 30 decks +4% synergy
Terramorphic Expanse
10% of 30 decks -6% synergy