Color Identity: G

Initial Card State
- Walking Ballista in exile (exiled by Agatha's Soul Cauldron).
- Agatha's Soul Cauldron and The Thing on the battlefield (The Thing with a +1/+1 counter on it).
Steps
- Activate The Thing by using Walking Ballista's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
- The Thing triggers, putting two +1/+1 counters on it.
- Repeat.
Results
- Infinite +1/+1 counters on a creature.
- Infinite damage.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).