Eternal Scourge + Young Deathclaws + Crystalline Crawler + Shilgengar, Sire of Famine + Loading Zone

Eternal Scourge

Young Deathclaws

Crystalline Crawler

Shilgengar, Sire of Famine

Loading Zone

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 Loading Zone.
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 Shilgengar by sacrificing Eternal Scourge.
5. Repeat.

This clever loop leverages Young Deathclaws to grant Eternal Scourge a scavenge ability, letting you exile it from the graveyard to target Crystalline Crawler. Because Loading Zone doubles all incoming counters, paying three mana yields a massive influx of six +1/+1 counters on Crystalline Crawler, which you can immediately strip away for six mana of any color. Shilgengar, Sire of Famine provides the necessary sacrifice outlet to fuel the cycle while churning out an endless supply of Blood tokens, and since Eternal Scourge can always be recast straight out of exile, the entire engine resets seamlessly without ever losing momentum.