Rite of Passage + Triskelion + Mirage Mirror

Rite of Passage

Triskelion

Mirage Mirror

How it works

1. Activate Mirage Mirror by paying 2, causing it to become a copy of Rite of Passage until end of turn.
2. Activate Triskelion by removing a +1/+1 counter from it, dealing 1 damage to itself.
3. Rite of Passage and Mirage Mirror trigger, putting two +1/+1 counters on Triskelion.
4. Repeat from step 2 an arbitrarily large number of times.
5. Move to the next turn, removing all damage marked on Triskelion.
6. Activate Triskelion by removing a +1/+1 counter from it, dealing 1 damage to any target.
7. Repeat step 6 as desired.