Woe Strider + Fiend Hunter + Metamorphosis Fanatic

Woe Strider

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 Woe Strider 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 Woe Strider ability.
8. Repeat from step 3.

This ingenious loop relies on an infinite recursion of entering and leaving the battlefield to continuously trigger your death and sacrifice synergies. By utilizing Woe Strider as the designated sacrifice outlet, you send Fiend Hunter straight to the graveyard, which in turn causes the exiled Metamorphosis Fanatic to return to play. That very return immediately triggers Metamorphosis Fanatic's own enters-the-battlefield ability to pull Fiend Hunter right back out of the graveyard, resetting the loop. Woe Strider's passive scry ability further pads this engine by letting you sculpt your draws on demand with every single sacrifice you make.