Eternal Scourge + Young Deathclaws + Crystalline Crawler + Viscera Seer + Loading Zone

Eternal Scourge

Young Deathclaws

Crystalline Crawler

Viscera Seer

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 Viscera Seer by sacrificing Eternal Scourge.
5. Repeat.

This intricate loop transforms a graveyard and a few battlefield pieces into an engine for infinite sacrifices and scry triggers. Young Deathclaws is the crucial enabler here, granting Eternal Scourge scavenge so it can repeatedly exile itself from the graveyard; because Eternal Scourge can also be cast directly from exile, the creature is always ready to return. Meanwhile, Loading Zone supercharges the scavenge ability by doubling the counters placed on Crystalline Crawler, providing more than enough +1/+1 counters to fuel the crawler's mana-producing ability and pay for the recurring costs. Finally, Viscera Seer acts as the reliable outlet to sacrifice Eternal Scourge each time it returns, letting you churn through your deck infinitely.