Eternal Scourge + Young Deathclaws + Crystalline Crawler + Blasting Station + Shang-Chi, Martial Mentor

Eternal Scourge

Young Deathclaws

Crystalline Crawler

Blasting Station

Shang-Chi, Martial Mentor

How it works

1. Activate Eternal Scourge's scavenge ability, granted to it by Young Deathclaws, by paying 3 and exiling Eternal Scourge from your graveyard, putting six +1/+1 counters on Crystalline Crawler due to Shang-Chi.
2. Activate Crystalline Crawler six times by removing six +1/+1 counters from it, adding 6.
3. Cast Eternal Scourge from exile by paying 3.
4. When Eternal Scourge enters, Blasting Station triggers, untapping Blasting Station.
5. Activate Blasting Station by tapping it and sacrificing Eternal Scourge.
6. Repeat.