Agatha's Soul Cauldron
Walking Ballista
Celestial Unicorn

   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
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