Vigor + Walking Ballista + Taii Wakeen, Perfect Shot

Vigor

Walking Ballista

Taii Wakeen, Perfect Shot

How it works

1. Activate Taii Wakeen by paying 1 and tapping it, increasing the amount of damage sources you control deal this turn by 1.
2. Activate Walking Ballista's second ability by removing a +1/+1 counter from it, putting two +1/+1 counters on it due to Vigor.
3. Activate Walking Ballista's second ability by removing a +1/+1 counter from it, dealing 2 damage to any target.
4. Repeat from step 2 as desired.