Rite of Passage + Triskelion + Conclave Mentor

Rite of Passage

Triskelion

Conclave Mentor

How it works

1. Activate Triskelion by removing a +1/+1 counter from it, dealing 1 damage to itself.
2. Rite of Passage triggers, putting two +1/+1 counters on Triskelion.
3. Repeat an arbitrarily large number of times.
4. Move to the next turn, removing all damage marked on Triskelion.
5. Activate Triskelion by removing a +1/+1 counter from it, dealing 1 damage to any target.
6. Repeat step 5 as desired.

This clever loop transforms Triskelion into a self-sustaining engine by dealing damage to itself to trigger Rite of Passage, which normally would just replace the counter you removed. However, the brilliant addition of Conclave Mentor shifts the math entirely in your favor, ensuring that every time Triskelion shoots itself, it actually gains a net surplus of +1/+1 counters. Once you have built up an arbitrarily massive supply of counters using this internal cycle, you can simply pivot that firepower outward to deal infinite damage to any target of your choice.