Halo Fountain
Intruder Alarm
Karn, the Great Creator

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
Halo Fountain does not have summoning sickness. You control a creature that can tap to produce at least .

   Steps

How does this combo work?
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

What do I get from this combo?
Infinite creature tokens
Infinite ETB
Infinite mana creatures you control can produce
Infinite untap of creatures
Belisarius Cawl
0.9%inclusion9 decks1.04K decks
Shorikai, Genesis Engine
0.0%inclusion7 decks19.3K decks
Merieke Ri Berit
0.2%inclusion5 decks2.41K decks
Urtet, Remnant of Memnarch
0.0%inclusion2 decks15.1K decks
Rukarumel, Biologist
0.0%inclusion1 decks3.85K decks
Phelddagrif
0.0%inclusion1 decks3.08K decks
Sydri, Galvanic Genius
0.0%inclusion1 decks2.59K decks
Urza, Prince of Kroog
0.0%inclusion1 decks2.48K decks
Urianger Augurelt
0.1%inclusion1 decks752 decks
Grand Arbiter Augustin IV
0.0%inclusion1 decks10.7K decks
Jodah, the Unifier
0.0%inclusion1 decks26.5K decks
Dr. Madison Li
0.0%inclusion1 decks7.05K decks
Kellan, the Kid
0.0%inclusion1 decks7.09K decks
Galadriel, Light of Valinor
0.0%inclusion1 decks14K decks
Tocasia, Dig Site Mentor
0.1%inclusion1 decks1.13K decks
New Cards
Gran-Gran
14%inclusion1 decks7 decks
13%synergy
High Synergy Cards
Cryptolith Rite
63%inclusion5 decks8 decks
59%synergy
Grim Tutor
60%inclusion6 decks10 decks
56%synergy
Fabricate
56%inclusion19 decks34 decks
50%synergy
Unwinding Clock
47%inclusion16 decks34 decks
45%synergy
Dauthi Voidwalker
50%inclusion5 decks10 decks
43%synergy
Entomb
50%inclusion5 decks10 decks
43%synergy
Thousand-Year Elixir
41%inclusion14 decks34 decks
40%synergy
Ancient Den
44%inclusion15 decks34 decks
39%synergy
Etherium Sculptor
44%inclusion15 decks34 decks
38%synergy
Uthros, Titanic Godcore
42%inclusion5 decks12 decks
38%synergy
Top Cards
Swords to Plowshares
74%inclusion25 decks34 decks
12%synergy
Dark Ritual
50%inclusion5 decks10 decks
26%synergy
Heroic Intervention
50%inclusion4 decks8 decks
20%synergy
Esper Sentinel
44%inclusion15 decks34 decks
25%synergy
Foundry Inspector
41%inclusion14 decks34 decks
37%synergy
Dramatic Reversal
41%inclusion14 decks34 decks
37%synergy
Path to Exile
41%inclusion14 decks34 decks
-6%synergy
Unctus, Grand Metatect
38%inclusion13 decks34 decks
37%synergy
Silver Myr
38%inclusion13 decks34 decks
36%synergy
Dispatch
38%inclusion13 decks34 decks
33%synergy
Game Changers
Vampiric Tutor
60%inclusion6 decks10 decks
45%synergy
Demonic Tutor
60%inclusion6 decks10 decks
40%synergy
Opposition Agent
50%inclusion5 decks10 decks
45%synergy
Orcish Bowmasters
50%inclusion5 decks10 decks
41%synergy
Enlightened Tutor
47%inclusion16 decks34 decks
32%synergy
Cyclonic Rift
47%inclusion16 decks34 decks
24%synergy
Smothering Tithe
38%inclusion13 decks34 decks
17%synergy
Mana Vault
29%inclusion10 decks34 decks
23%synergy
The One Ring
24%inclusion8 decks34 decks
15%synergy
Grim Monolith
21%inclusion7 decks34 decks
19%synergy
Creatures
Copper Myr
38%inclusion3 decks8 decks
36%synergy
Voyager Quickwelder
38%inclusion6 decks16 decks
36%synergy
Emry, Lurker of the Loch
35%inclusion12 decks34 decks
31%synergy
Padeem, Consul of Innovation
32%inclusion11 decks34 decks
29%synergy
Sai, Master Thopterist
32%inclusion11 decks34 decks
29%synergy
Solemn Simulacrum
32%inclusion11 decks34 decks
20%synergy
Gold Myr
29%inclusion10 decks34 decks
27%synergy
Urza, Lord High Artificer
29%inclusion10 decks34 decks
26%synergy
Thought Monitor
29%inclusion10 decks34 decks
26%synergy
Aphetto Alchemist
26%inclusion9 decks34 decks
26%synergy
Drumbellower
26%inclusion9 decks34 decks
25%synergy
The Reality Chip
26%inclusion9 decks34 decks
23%synergy
Ornithopter of Paradise
24%inclusion8 decks34 decks
19%synergy
Shimmer Myr
21%inclusion7 decks34 decks
19%synergy
Palladium Myr
21%inclusion7 decks34 decks
19%synergy
Diversion Unit
19%inclusion3 decks16 decks
18%synergy
Mendicant Core, Guidelight
19%inclusion3 decks16 decks
17%synergy
Fatestitcher
18%inclusion6 decks34 decks
17%synergy
White Plume Adventurer
18%inclusion6 decks34 decks
16%synergy
Bronze Guardian
18%inclusion6 decks34 decks
16%synergy
Kappa Cannoneer
18%inclusion6 decks34 decks
15%synergy
Spellskite
18%inclusion6 decks34 decks
14%synergy
Drannith Magistrate
18%inclusion6 decks34 decks
13%synergy
Sicarian Infiltrator
15%inclusion5 decks34 decks
14%synergy
Kotori, Pilot Prodigy
15%inclusion5 decks34 decks
14%synergy
Ethersworn Canonist
15%inclusion5 decks34 decks
13%synergy
Urza, Prince of Kroog
15%inclusion5 decks34 decks
13%synergy
Mondrak, Glory Dominus
15%inclusion5 decks34 decks
8%synergy
Phyrexian Metamorph
15%inclusion5 decks34 decks
7%synergy
Vedalken Archmage
12%inclusion4 decks34 decks
11%synergy
Urza, Lord Protector
12%inclusion4 decks34 decks
11%synergy
Oswald Fiddlebender
12%inclusion4 decks34 decks
10%synergy
Jhoira's Familiar
12%inclusion4 decks34 decks
10%synergy
Illustrious Wanderglyph
12%inclusion4 decks34 decks
10%synergy
Forensic Gadgeteer
12%inclusion4 decks34 decks
9%synergy
Myr Galvanizer
8.8%inclusion3 decks34 decks
9%synergy
Katsumasa, the Animator
8.8%inclusion3 decks34 decks
8%synergy
Alloy Myr
8.8%inclusion3 decks34 decks
8%synergy
Vedalken Engineer
8.8%inclusion3 decks34 decks
8%synergy
Platinum Angel
8.8%inclusion3 decks34 decks
8%synergy
Liberator, Urza's Battlethopter
8.8%inclusion3 decks34 decks
8%synergy
Master Transmuter
8.8%inclusion3 decks34 decks
7%synergy
Myr Retriever
8.8%inclusion3 decks34 decks
7%synergy
Elesh Norn, Mother of Machines
8.8%inclusion3 decks34 decks
6%synergy
Wonder
8.8%inclusion3 decks34 decks
5%synergy
Thassa's Oracle
8.8%inclusion3 decks34 decks
2%synergy
Grand Abolisher
8.8%inclusion3 decks34 decks
0%synergy
Instants
Mana Drain
35%inclusion12 decks34 decks
21%synergy
Dovin's Veto
35%inclusion12 decks34 decks
17%synergy
Counterspell
35%inclusion12 decks34 decks
-7%synergy
An Offer You Can't Refuse
29%inclusion10 decks34 decks
5%synergy
Teferi's Protection
26%inclusion9 decks34 decks
10%synergy
Swan Song
26%inclusion9 decks34 decks
9%synergy
Fierce Guardianship
26%inclusion9 decks34 decks
9%synergy
Generous Gift
26%inclusion9 decks34 decks
4%synergy
Whir of Invention
24%inclusion8 decks34 decks
21%synergy
Arcane Denial
24%inclusion8 decks34 decks
3%synergy
Flusterstorm
21%inclusion7 decks34 decks
13%synergy
Mindbreak Trap
18%inclusion6 decks34 decks
13%synergy
Force of Negation
18%inclusion6 decks34 decks
9%synergy
Three Steps Ahead
16%inclusion5 decks32 decks
13%synergy
Consign to Memory
15%inclusion4 decks27 decks
14%synergy
Stifle
15%inclusion5 decks34 decks
14%synergy
Intuition
15%inclusion5 decks34 decks
13%synergy
Force of Will
15%inclusion5 decks34 decks
5%synergy
Permission Denied
8.8%inclusion3 decks34 decks
7%synergy
Muddle the Mixture
8.8%inclusion3 decks34 decks
4%synergy
Mental Misstep
8.8%inclusion3 decks34 decks
3%synergy
Mystical Tutor
8.8%inclusion3 decks34 decks
-4%synergy
Negate
8.8%inclusion3 decks34 decks
-12%synergy
Sorceries
Organic Extinction
32%inclusion11 decks34 decks
30%synergy
Beseech the Mirror
30%inclusion3 decks10 decks
27%synergy
Transmute Artifact
24%inclusion8 decks34 decks
23%synergy
Thoughtcast
24%inclusion8 decks34 decks
20%synergy
Sevinne's Reclamation
21%inclusion7 decks34 decks
13%synergy
Supreme Verdict
21%inclusion7 decks34 decks
8%synergy
Brilliant Restoration
15%inclusion5 decks34 decks
13%synergy
Steelshaper's Gift
15%inclusion5 decks34 decks
12%synergy
Dance of the Manse
15%inclusion5 decks34 decks
12%synergy
Anchor to Reality
12%inclusion4 decks34 decks
11%synergy
Reshape
12%inclusion4 decks34 decks
11%synergy
Idyllic Tutor
12%inclusion4 decks34 decks
8%synergy
Farewell
12%inclusion4 decks34 decks
-1%synergy
One with the Machine
8.8%inclusion3 decks34 decks
8%synergy
Echo of Eons
8.8%inclusion3 decks34 decks
8%synergy
Preordain
8.8%inclusion3 decks34 decks
0%synergy
Austere Command
8.8%inclusion3 decks34 decks
-3%synergy
Utility Artifacts
Mycosynth Lattice
35%inclusion12 decks34 decks
34%synergy
Skullclamp
35%inclusion12 decks34 decks
24%synergy
Voltaic Key
32%inclusion11 decks34 decks
31%synergy
Manifold Key
29%inclusion10 decks34 decks
28%synergy
Isochron Scepter
29%inclusion10 decks34 decks
27%synergy
Lightning Greaves
29%inclusion10 decks34 decks
5%synergy
Illusionist's Bracers
26%inclusion9 decks34 decks
25%synergy
Darksteel Forge
26%inclusion9 decks34 decks
25%synergy
Shorikai, Genesis Engine
26%inclusion9 decks34 decks
24%synergy
Mystic Forge
26%inclusion9 decks34 decks
24%synergy
Repurposing Bay
25%inclusion4 decks16 decks
24%synergy
Sensei's Divining Top
24%inclusion8 decks34 decks
19%synergy
Ashnod's Altar
24%inclusion8 decks34 decks
17%synergy
Skysovereign, Consul Flagship
21%inclusion7 decks34 decks
20%synergy
Encroaching Mycosynth
21%inclusion7 decks34 decks
20%synergy
Parhelion II
21%inclusion7 decks34 decks
19%synergy
Rings of Brighthearth
21%inclusion7 decks34 decks
19%synergy
Staff of Domination
21%inclusion7 decks34 decks
19%synergy
Imposter Mech
21%inclusion7 decks34 decks
19%synergy
Salvation Engine
19%inclusion3 decks16 decks
18%synergy
Sting, the Glinting Dagger
18%inclusion6 decks34 decks
17%synergy
Cloud Key
18%inclusion6 decks34 decks
16%synergy
Lavaspur Boots
16%inclusion5 decks32 decks
14%synergy
Simulacrum Synthesizer
16%inclusion5 decks32 decks
14%synergy
Cursed Scroll
15%inclusion5 decks34 decks
15%synergy
Thunderhawk Gunship
15%inclusion5 decks34 decks
14%synergy
Mobilizer Mech
15%inclusion5 decks34 decks
14%synergy
Smuggler's Copter
15%inclusion5 decks34 decks
14%synergy
Sculpting Steel
15%inclusion5 decks34 decks
13%synergy
The Millennium Calendar
12%inclusion4 decks34 decks
11%synergy
Weatherlight
12%inclusion4 decks34 decks
11%synergy
Peacewalker Colossus
12%inclusion4 decks34 decks
11%synergy
Clock of Omens
12%inclusion4 decks34 decks
11%synergy
Mirage Mirror
12%inclusion4 decks34 decks
10%synergy
Aetherflux Reservoir
12%inclusion4 decks34 decks
8%synergy
Idol of Oblivion
12%inclusion4 decks34 decks
7%synergy
Knight Paladin
8.8%inclusion3 decks34 decks
9%synergy
Surgehacker Mech
8.8%inclusion3 decks34 decks
8%synergy
The Golden Throne
8.8%inclusion3 decks34 decks
8%synergy
Unlicensed Hearse
8.8%inclusion3 decks34 decks
8%synergy
Reckoner Bankbuster
8.8%inclusion3 decks34 decks
8%synergy
Nautiloid Ship
8.8%inclusion3 decks34 decks
8%synergy
Nevinyrral's Disk
8.8%inclusion3 decks34 decks
8%synergy
Forsaken Monument
8.8%inclusion3 decks34 decks
7%synergy
Enchantments
Rhystic Study
38%inclusion13 decks34 decks
14%synergy
Doubling Season
38%inclusion3 decks8 decks
28%synergy
Unstoppable Plan
25%inclusion4 decks16 decks
23%synergy
Mystic Remora
24%inclusion8 decks34 decks
7%synergy
Mirrodin Besieged
21%inclusion7 decks34 decks
19%synergy
Anointed Procession
18%inclusion6 decks34 decks
10%synergy
Efficient Construction
15%inclusion5 decks34 decks
13%synergy
Propaganda
15%inclusion5 decks34 decks
1%synergy
Mind Over Matter
12%inclusion4 decks34 decks
11%synergy
Dress Down
12%inclusion4 decks34 decks
11%synergy
Tempered Steel
8.8%inclusion3 decks34 decks
8%synergy
Rest in Peace
8.8%inclusion3 decks34 decks
7%synergy
Freed from the Real
8.8%inclusion3 decks34 decks
7%synergy
Mechanized Production
8.8%inclusion3 decks34 decks
6%synergy
Thopter Spy Network
8.8%inclusion3 decks34 decks
5%synergy
Planeswalkers
Tezzeret, Betrayer of Flesh
18%inclusion6 decks34 decks
17%synergy
Tezzeret the Seeker
18%inclusion6 decks34 decks
15%synergy
Teferi, Who Slows the Sunset
8.8%inclusion3 decks34 decks
7%synergy
Utility Lands
Seat of the Synod
44%inclusion15 decks34 decks
37%synergy
Urza's Saga
44%inclusion15 decks34 decks
37%synergy
Minamo, School at Water's Edge
41%inclusion14 decks34 decks
37%synergy
Academy Ruins
38%inclusion13 decks34 decks
33%synergy
Reliquary Tower
38%inclusion13 decks34 decks
8%synergy
Darksteel Citadel
35%inclusion12 decks34 decks
32%synergy
Otawara, Soaring City
35%inclusion12 decks34 decks
19%synergy
Inventors' Fair
32%inclusion11 decks34 decks
29%synergy
Archway of Innovation
30%inclusion8 decks27 decks
26%synergy
Buried Ruin
26%inclusion9 decks34 decks
22%synergy
Ancient Tomb
24%inclusion8 decks34 decks
14%synergy
Scorched Ruins
18%inclusion6 decks34 decks
17%synergy
Mech Hangar
18%inclusion6 decks34 decks
17%synergy
Fomori Vault
16%inclusion5 decks32 decks
15%synergy
Monumental Henge
15%inclusion4 decks27 decks
12%synergy
Lotus Vale
15%inclusion5 decks34 decks
14%synergy
Lotus Field
15%inclusion5 decks34 decks
13%synergy
Hall of Heliod's Generosity
12%inclusion4 decks34 decks
5%synergy
Eiganjo, Seat of the Empire
12%inclusion4 decks34 decks
5%synergy
Urza's Power Plant
8.8%inclusion3 decks34 decks
7%synergy
Urza's Mine
8.8%inclusion3 decks34 decks
7%synergy
Urza's Tower
8.8%inclusion3 decks34 decks
7%synergy
Yavimaya, Cradle of Growth
8.8%inclusion3 decks34 decks
0%synergy
Mystic Sanctuary
8.8%inclusion3 decks34 decks
-2%synergy
Mana Artifacts
Sol Ring
97%inclusion33 decks34 decks
13%synergy
Arcane Signet
91%inclusion31 decks34 decks
19%synergy
Talisman of Hierarchy
60%inclusion6 decks10 decks
34%synergy
Talisman of Dominance
50%inclusion5 decks10 decks
17%synergy
Talisman of Progress
41%inclusion14 decks34 decks
16%synergy
Basalt Monolith
35%inclusion12 decks34 decks
33%synergy
Fellwar Stone
35%inclusion12 decks34 decks
15%synergy
Liquimetal Torque
29%inclusion10 decks34 decks
27%synergy
Mox Opal
29%inclusion10 decks34 decks
25%synergy
Thought Vessel
26%inclusion9 decks34 decks
9%synergy
Azorius Signet
26%inclusion9 decks34 decks
4%synergy
Crystal Skull, Isu Spyglass
23%inclusion6 decks26 decks
21%synergy
Mind Stone
21%inclusion7 decks34 decks
6%synergy
Chrome Mox
18%inclusion6 decks34 decks
12%synergy
Mox Diamond
15%inclusion5 decks34 decks
10%synergy
Commander's Sphere
15%inclusion5 decks34 decks
2%synergy
Gilded Lotus
12%inclusion4 decks34 decks
9%synergy
Mox Amber
12%inclusion4 decks34 decks
7%synergy
Thran Dynamo
12%inclusion4 decks34 decks
7%synergy
Chromatic Lantern
12%inclusion4 decks34 decks
3%synergy
Empowered Autogenerator
8.8%inclusion3 decks34 decks
8%synergy
Sonic Screwdriver
8.8%inclusion3 decks34 decks
8%synergy
Chromatic Orrery
8.8%inclusion3 decks34 decks
7%synergy
Mana Crypt
8.8%inclusion3 decks34 decks
7%synergy
Decanter of Endless Water
8.8%inclusion3 decks34 decks
5%synergy
Everflowing Chalice
8.8%inclusion3 decks34 decks
5%synergy
Midnight Clock
8.8%inclusion3 decks34 decks
4%synergy
Lotus Petal
8.8%inclusion3 decks34 decks
2%synergy
Lands
Command Tower
91%inclusion31 decks34 decks
17%synergy
The World Tree
75%inclusion3 decks4 decks
46%synergy
Hallowed Fountain
74%inclusion25 decks34 decks
34%synergy
Breeding Pool
63%inclusion5 decks8 decks
21%synergy
Scrubland
60%inclusion6 decks10 decks
46%synergy
Underground Sea
60%inclusion6 decks10 decks
45%synergy
Vault of Champions
60%inclusion6 decks10 decks
36%synergy
Morphic Pool
60%inclusion6 decks10 decks
35%synergy
Godless Shrine
60%inclusion6 decks10 decks
19%synergy
Watery Grave
60%inclusion6 decks10 decks
19%synergy
Flooded Strand
56%inclusion19 decks34 decks
44%synergy
Sea of Clouds
53%inclusion18 decks34 decks
28%synergy
Exotic Orchard
50%inclusion17 decks34 decks
14%synergy
Temple Garden
50%inclusion4 decks8 decks
11%synergy
Tundra
41%inclusion14 decks34 decks
27%synergy
Prairie Stream
41%inclusion14 decks34 decks
8%synergy
Windswept Heath
38%inclusion13 decks34 decks
27%synergy
Adarkar Wastes
38%inclusion13 decks34 decks
15%synergy
Rejuvenating Springs
38%inclusion3 decks8 decks
11%synergy
Razortide Bridge
35%inclusion12 decks34 decks
29%synergy
Deserted Beach
35%inclusion12 decks34 decks
18%synergy
Glacial Fortress
35%inclusion12 decks34 decks
3%synergy
Misty Rainforest
29%inclusion10 decks34 decks
18%synergy
Spire of Industry
26%inclusion9 decks34 decks
23%synergy
Arid Mesa
26%inclusion9 decks34 decks
16%synergy
Nimbus Maze
24%inclusion8 decks34 decks
19%synergy
Marsh Flats
24%inclusion8 decks34 decks
13%synergy
The Mycosynth Gardens
21%inclusion7 decks34 decks
19%synergy
Gemstone Caverns
21%inclusion7 decks34 decks
16%synergy
Cavern of Souls
21%inclusion7 decks34 decks
13%synergy
Verdant Catacombs
21%inclusion7 decks34 decks
10%synergy
Polluted Delta
21%inclusion7 decks34 decks
9%synergy
Temple of Enlightenment
21%inclusion7 decks34 decks
4%synergy
Hengegate Pathway
18%inclusion6 decks34 decks
11%synergy
Scalding Tarn
18%inclusion6 decks34 decks
7%synergy
Bloodstained Mire
18%inclusion6 decks34 decks
6%synergy
Port Town
18%inclusion6 decks34 decks
3%synergy
Irrigated Farmland
15%inclusion5 decks34 decks
7%synergy
Azorius Chancery
15%inclusion5 decks34 decks
1%synergy
Skycloud Expanse
15%inclusion5 decks34 decks
0%synergy
Floodfarm Verge
14%inclusion3 decks22 decks
4%synergy
Mystic Gate
12%inclusion4 decks34 decks
5%synergy
Forbidden Orchard
8.8%inclusion3 decks34 decks
7%synergy
Meticulous Archive
8.8%inclusion3 decks34 decks
0%synergy
Fabled Passage
8.8%inclusion3 decks34 decks
0%synergy
Path of Ancestry
8.8%inclusion3 decks34 decks
-13%synergy