Prowling Geistcatcher + Saffi Eriksdotter + Altar of Dementia

Prowling Geistcatcher

Saffi Eriksdotter

Altar of Dementia

How it works

1. Activate Saffi by sacrificing it, targeting Prowling Geistcatcher.
2. When Saffi dies, Prowling Geistcatcher's first ability triggers, exiling Saffi from your graveyard.
3. Resolve the Saffi ability.
4. Activate Altar of Dementia by sacrificing Prowling Geistcatcher.
5. When Prowling Geistcatcher dies, its second ability and Saffi trigger.
6. Resolve the Saffi trigger, returning Prowling Geistcatcher from your graveyard to the battlefield.
7. Resolve the Prowling Geistcatcher trigger, returning Saffi from exile to the battlefield.
8. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Prowling Geistcatcher's power.
9. Repeat.

This loop creates a seamless, self-sustaining cycle of sacrifice and resurrection by leveraging Prowling Geistcatcher as both the sacrificial engine and the recursive anchor. Saffi Eriksdotter acts as the catalyst by setting up a delayed trigger to pull Prowling Geistcatcher right back from the grave, while Altar of Dementia converts every iteration into a mill threat that can strip an opponent's library down to nothing. As you feed creatures to the Altar, Prowling Geistcatcher's exile ability smartly catches Saffi Eriksdotter and brings her right back alongside any other collateral, ensuring the loop never runs out of fuel.