Dualcaster Mage + Grimgrin, Corpse-Born + Sevinne's Reclamation

Dualcaster Mage

Grimgrin, Corpse-Born

Sevinne's Reclamation

How it works

1. Cast Sevinne's Reclamation by paying its mana cost, targeting any applicable target.
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, targeting Sevinne's Reclamation.
4. Holding priority, activate Grimgrin by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Sevinne's Reclamation, with the copy targeting Dualcaster Mage
6. Resolve the Sevinne's Reclamation copy, returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This elegant loop leverages Dualcaster Mage and Sevinne's Reclamation in a recursive dance where the copy targets the very mage that created it, constantly bringing it back from the graveyard. The static and activated abilities of Grimgrin, Corpse-Born provide the necessary sacrifice outlet to feed this engine, turning every iteration into a chance to untap Grimgrin and pile infinite +1/+1 counters onto him. Because Sevinne's Reclamation can be continuously looped from the graveyard via the Mage's triggers, you generate an endless stream of enters-the-battlefield, leaves-the-battlefield, and sacrifice triggers.