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
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Enchantments
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Planeswalkers
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Utility Lands
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26%synergy
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Mana Artifacts
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35%synergy
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27%synergy
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21%synergy
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Commander's Sphere
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7%synergy
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7%synergy
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3%synergy
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Everflowing Chalice
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Midnight Clock
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Lands
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22%synergy
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54%inclusion19 decks35 decks
29%synergy
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15%synergy
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11%synergy
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43%inclusion15 decks35 decks
29%synergy
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29%synergy
Prairie Stream
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6%synergy
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38%inclusion3 decks8 decks
11%synergy
Adarkar Wastes
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14%synergy
Razortide Bridge
34%inclusion12 decks35 decks
28%synergy
Deserted Beach
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17%synergy
Glacial Fortress
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2%synergy
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31%inclusion11 decks35 decks
20%synergy
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18%synergy
Spire of Industry
26%inclusion9 decks35 decks
23%synergy
Marsh Flats
26%inclusion9 decks35 decks
15%synergy
Nimbus Maze
23%inclusion8 decks35 decks
19%synergy
Cavern of Souls
23%inclusion8 decks35 decks
16%synergy
Verdant Catacombs
23%inclusion8 decks35 decks
12%synergy
Polluted Delta
23%inclusion8 decks35 decks
11%synergy
The Mycosynth Gardens
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18%synergy
Gemstone Caverns
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15%synergy
Scalding Tarn
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9%synergy
Bloodstained Mire
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9%synergy
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3%synergy
Hengegate Pathway
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11%synergy
Port Town
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2%synergy
Irrigated Farmland
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6%synergy
Azorius Chancery
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Skycloud Expanse
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4%synergy
Mystic Gate
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Forbidden Orchard
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Meticulous Archive
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Fabled Passage
8.6%inclusion3 decks35 decks
-1%synergy
Path of Ancestry
8.6%inclusion3 decks35 decks
-13%synergy