Strength of Will + Pir, Imaginative Rascal + Walking Ballista

Strength of Will

Pir, Imaginative Rascal

Walking Ballista

How it works

1. Cast Strength of Will by paying 1, targeting Walking Ballista.
2. Activate Walking Ballista by removing a +1/+1 counter from it, dealing 1 damage to it.
3. Walking Ballista triggers, putting two +1/+1 counters on it due to Pir.
4. Activate Walking Ballista by removing a +1/+1 counter from it, dealing 1 damage to any target.
5. Repeat from step 2.

This clever loop relies on turning Walking Ballista's self-damage into a net-positive resource by enlisting Strength of Will to reward it with counters whenever it takes damage. Pir, Imaginative Rascal acts as the ultimate amplifier here, ensuring that every single counter placement is naturally boosted to generate a surplus. By repeatedly having Walking Ballista shoot itself to trigger growth and then redirecting those leftover counters elsewhere, you cleanly achieve infinite damage.