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 all creatures
Belisarius Cawl
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14%synergy
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Mana Artifacts
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13%synergy
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22%synergy
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27%synergy
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20%synergy
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Mind Stone
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3%synergy
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5%synergy
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Lands
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29%synergy
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45%synergy
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4%synergy
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19%synergy
Deserted Beach
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13%synergy
Spire of Industry
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24%synergy
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17%synergy
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20%synergy
Marsh Flats
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14%synergy
The Mycosynth Gardens
21%inclusion7 decks33 decks
19%synergy
Cavern of Souls
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14%synergy
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21%inclusion7 decks33 decks
10%synergy
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21%inclusion7 decks33 decks
9%synergy
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21%inclusion7 decks33 decks
6%synergy
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21%inclusion7 decks33 decks
5%synergy
Gemstone Caverns
18%inclusion6 decks33 decks
13%synergy
Hengegate Pathway
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12%synergy
Scalding Tarn
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7%synergy
Bloodstained Mire
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7%synergy
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18%inclusion6 decks33 decks
4%synergy
Irrigated Farmland
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Azorius Chancery
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Forbidden Orchard
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7%synergy
Seachrome Coast
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4%synergy