Dualcaster Mage + Yahenni, Undying Partisan + Vincent's Limit Break

Dualcaster Mage

Yahenni, Undying Partisan

Vincent's Limit Break

How it works

1. Cast Vincent's Limit Break by paying its mana cost.
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, copying Vincent's Limit Break, with the copy targeting Dualcaster Mage.
4. Resolve the copy of Vincent's Limit Break.
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 loop turns an innocent transformation spell into an endless reincarnation engine by cleverly manipulating the stack and the battlefield. By casting Vincent's Limit Break and responding with Dualcaster Mage, you set up a reflexive copy chain that continually retargets the Mage with the enchantment's revival effect. Once Dualcaster Mage is sacrificed to Yahenni, Undying Partisan's activated ability, the resulting death trigger returns the Mage straight back to the battlefield—where it immediately re-triggers to copy Vincent's Limit Break all over again. While you repeat this cycle to rack up infinite sacrifices, leaves-the-battlefield events, and death triggers, Yahenni happily grows larger and larger with a mountain of +1/+1 counters from the ceaseless demise of your own creatures.