Dualcaster Mage + Feign Death + Yahenni, Undying Partisan

Dualcaster Mage

Feign Death

Yahenni, Undying Partisan

How it works

1. Cast Feign Death by paying its mana cost.
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, copying Feign Death, with the copy targeting Dualcaster Mage.
4. Resolve the copy of Feign Death.
5. Holding priority, activate Yahenni by sacrificing Dualcaster Mage.
6. When Dualcaster Mage dies, it triggers, returning it from your graveyard to the battlefield.
7. Repeat from step 3.
8. Resolve all Yahenni abilities from step 5.

This clever loop relies on Feign Death to create a recursive engine by targeting Dualcaster Mage right as it enters the battlefield. Thanks to Dualcaster Mage's flash and its ability to copy spells upon entering, it can continuously target itself with the very spell that saves it from the graveyard. While this relentless cycle generates an endless stream of entries and sacrifices, Yahenni, Undying Partisan acts as both the willing executioner for your loops and a growing threat that feeds off every sacrifice.