Saffi Eriksdotter + Eternal Witness + Aluren + Carrion Feeder

Saffi Eriksdotter

Eternal Witness

Aluren

Carrion Feeder

How it works

1. Activate Saffi by sacrificing it, targeting Eternal Witness.
2. Activate Carrion Feeder by sacrificing Eternal Witness.
3. When Eternal Witness dies, Saffi triggers, returning Eternal Witness from your graveyard to the battlefield.
4. When Eternal Witness enters the battlefield, it triggers, returning Saffi from your graveyard to your hand.
5. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it.
6. Cast Saffi by paying 0 due to Aluren.
7. Repeat.

This elegant loop transforms Aluren into a mana-free engine by leveraging its ability to cast cheap creatures like Saffi Eriksdotter and Eternal Witness for zero mana. You use Carrion Feeder as a reliable sacrifice outlet to send Eternal Witness and Saffi Eriksdotter to the graveyard, where Saffi's self-sacrificing protection brings back Eternal Witness, and the returning Eternal Witness pulls Saffi right back to your hand. Repeating this cycle endlessly not only pumps Carrion Feeder into a towering threat with infinite +1/+1 counters, but also floods the board with an endless chain of entering, leaving, and dying creatures.