Dualcaster Mage + Carrion Feeder + Abnormal Endurance

Dualcaster Mage

Carrion Feeder

Abnormal Endurance

How it works

1. Cast Abnormal Endurance by paying its mana cost.
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, copying Abnormal Endurance, with the copy targeting Dualcaster Mage.
4. Resolve the copy of Abnormal Endurance.
5. Holding priority, activate Carrion Feeder 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 Carrion Feeder abilities from step 5.

This loop transforms a simple combat trick into a tireless sacrifice engine by turning Dualcaster Mage and Abnormal Endurance into an infinite recursion machine. You cast Abnormal Endurance and flash in Dualcaster Mage to copy it, targeting the Mage itself so that it is doomed to return whenever it hits the graveyard. Carrion Feeder acts as the willing executioner, gladly consuming the Mage to grow larger with a +1/+1 counter while triggering the delayed return from Abnormal Endurance over and over again. Every iteration feeds the Feeder and yields endless entry and exit triggers for any other synergy pieces you might have on the board.