Viscera Seer + Fiend Hunter + Metamorphosis Fanatic

Viscera Seer

Fiend Hunter

Metamorphosis Fanatic

How it works

1. Cast Fiend Hunter by paying its mana cost.
2. When Fiend Hunter enters, its first ability triggers, exiling Metamorphosis Fanatic.
3. Activate Viscera Seer by sacrificing Fiend Hunter.
4. When Fiend Hunter dies, its second ability triggers, returning Metamorphosis Fanatic from exile to the battlefield.
5. When Metamorphosis Fanatic enters, it triggers, returning Fiend Hunter from your graveyard to the battlefield.
6. When Fiend Hunter enters, its first ability triggers, exiling Metamorphosis Fanatic.
7. Resolve the Viscera Seer ability.
8. Repeat from step 3.

This loop creates an endless cycle of resurrection by bouncing back and forth between two key creatures. When Fiend Hunter enters, it exiles Metamorphosis Fanatic, which you then immediately sacrifice to Viscera Seer to set off a chain reaction. That sacrifice triggers Fiend Hunter's departure, returning Metamorphosis Fanatic to the battlefield so it can trigger its own entry ability and pull Fiend Hunter right back out of your graveyard. Because Metamorphosis Fanatic handles the creature retrieval while Viscera Seer acts as the sacrificial outlet, you can repeat this process indefinitely to churn through your deck with infinite scrys and death triggers.