Color Identity: G

Initial Card State
- All permanents on the battlefield (Walking Ballista with two or more +1/+1 counters on it).
Easy Prerequisites
- Walking Ballista has a +1/+1 counter on it.
Steps
- Activate Walking Ballista by removing a +1/+1 counter on it, targeting itself, but putting two +1/+1 counters on it due to Vigor.
- Activate Walking Ballista by removing a +1/+1 counter on it, dealing 1 damage to any target.
- Repeat.
Notes
- You may also target your other creatures in step 2 to put +1/+1 counters on them due to Vigor.
Results
- Infinite damage.
- Infinite +1/+1 counters on creatures you control.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).