Agatha's Soul Cauldron
Celestial Unicorn
Walking Ballista

   Prerequisites

What do I need to start this combo?
Walking Ballista in exile (Walking Ballista by Agatha's Soul Cauldron in exile).
Agatha's Soul Cauldron and Celestial Unicorn on the battlefield (Celestial Unicorn with a +1/+1 counter on it and has lifelink on the battlefield).

   Steps

How does this combo work?
1
Activate Celestial Unicorn by using Walking Ballista's ability by removing a +1/+1 counter from it, dealing 1 damage to any target and causing you to gain 1 life due to its lifelink.
2
Celestial Unicorn triggers, putting a +1/+1 counter on it.
3
Repeat.

   Results

What do I get from this combo?
Infinite damage
Infinite lifegain triggers
Infinite lifegain
Heliod, Sun-Crowned
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Linden, the Steadfast Queen
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High Synergy Cards
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Utility Lands
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Mana Artifacts
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13%synergy
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15%synergy
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Lands
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61%synergy
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55%synergy
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54%synergy
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37%synergy
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26%synergy
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36%synergy
Command Tower
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Overgrown Farmland
50%inclusion6 decks12 decks
33%synergy
Jungle Shrine
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18%synergy
Sacred Foundry
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14%synergy
Temple Garden
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11%synergy
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35%synergy
Savannah
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29%synergy
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Sunpetal Grove
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Exotic Orchard
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Windswept Heath
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17%synergy
Graypelt Refuge
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22%synergy
Razorverge Thicket
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20%synergy
Brushland
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Arid Mesa
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14%synergy
Wooded Foothills
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9%synergy
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Talon Gates of Madara
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11%synergy
Gemstone Caverns
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City of Brass
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4%synergy
Marsh Flats
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1%synergy
Flooded Strand
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1%synergy