Eternal Scourge + Young Deathclaws + Crystalline Crawler + Viscera Seer + Corpsejack Menace

Eternal Scourge

Young Deathclaws

Crystalline Crawler

Viscera Seer

Corpsejack Menace

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 Corpsejack Menace.
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. Activate Viscera Seer by sacrificing Eternal Scourge.
5. Repeat.

This clever loop uses Young Deathclaws to grant Eternal Scourge scavenge directly from the graveyard, turning the creature into a recurring resource that can be cast repeatedly from exile thanks to its own native ability. Every time you scavenge Eternal Scourge, Corpsejack Menace doubles the resulting +1/+1 counters placed on Crystalline Crawler, netting you a surplus of mana when you activate Crystalline Crawler to remove those counters for any color. Viscera Seer ties the whole engine together by providing a reliable sacrifice outlet to send Eternal Scourge right back to the graveyard, letting you repeat the process to generate infinite deaths, sacrifices, scrys, and storm count.