Umbral Collar Zealot + Dualcaster Mage + Graceful Reprieve

Umbral Collar Zealot

Dualcaster Mage

Graceful Reprieve

How it works

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

This clever loop hinges on the interplay between Dualcaster Mage and Graceful Reprieve to repeatedly trigger the enter-the-battlefield ability that keeps copying the spell right back onto the Mage. While the original Graceful Reprieve stays safely on the stack as a backup, Umbral Collar Zealot acts as the crucial sacrifice outlet that cleanly sends Dualcaster Mage to the graveyard—which instantly satisfies the condition for the resolution copy of Graceful Reprieve to drag the Mage right back to the battlefield. Because Umbral Collar Zealot's activated ability also lets you surveil 1 each time you feed it a creature, this infinite cycle lets you sculpt your entire library while generating boundless sacrifices, leaves-the-battlefield effects, and magecraft triggers.