Vigor + Triskelion + Primal Vigor

Vigor

Triskelion

Primal Vigor

How it works

1. Activate Triskelion by removing a +1/+1 counter on it, targeting itself, but putting two +1/+1 counters on it due to Vigor.
2. Activate Triskelion by removing a +1/+1 counter on it, dealing 1 damage to any target.
3. Repeat.

This explosive loop relies on Triskelion as both the ammunition and the target, removing its own counters to ping itself for damage. Ordinarily, this would simply destroy the construct, but Vigor steps in to fundamentally rewrite that math: instead of taking lethal damage, that self-inflicted harm is prevented entirely and converted into an influx of +1/+1 counters. Meanwhile, Primal Vigor supercharges the entire engine by doubling those counters, ensuring that every cycle leaves Triskelion with a net-positive growth spurt. This allows you to perpetually reinvest those counters into infinite damage directed at any target you choose, while growing all your other creatures to astronomical proportions in the process.