Gatta and Luzzu + Triskelion + Shang-Chi, Martial Mentor

Gatta and Luzzu

Triskelion

Shang-Chi, Martial Mentor

How it works

1. Cast Gatta and Luzzu by paying 2.
2. When Gatta and Luzzu enters the battlefield, it triggers, targeting Triskelion.
3. Activate Triskelion by removing a +1/+1 counter from it, targeting itself, but instead putting two +1/+1 counters on it due to Gatta and Luzzu and Shang-Chi.
4. Activate Triskelion by removing a +1/+1 counter from it, dealing 1 damage to any target.
5. Repeat from step 3.