Strength of Will + Triskelion + Pir, Imaginative Rascal

Strength of Will

Triskelion

Pir, Imaginative Rascal

How it works

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

This clever loop begins by pointing Strength of Will at Triskelion, granting it both indestructible and the ability to grow whenever it takes damage. Because Pir, Imaginative Rascal is there to boost any incoming counters, every time Triskelion shoots itself for 1 damage to trigger its own growth, it actually gains two +1/+1 counters instead of just one. You can then use those extra counters to ping your opponents to death while endlessly repeating the process for infinite damage and infinite counters.