Exhume + Dualcaster Mage + Phantom Train

Exhume

Dualcaster Mage

Phantom Train

How it works

1. Cast Exhume by paying its mana cost
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, targeting Exhume.
4. Holding priority, activate Phantom Train by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Exhume
6. Resolve the Exhume copy, returning Dualcaster Mage from your graveyard to the battlefield.
7. Repeat from step 3.

This loop turns a simple graveyard resurrection spell into a self-sustaining engine by cleverly recycling our wizard. When you cast Exhume and follow it up with Dualcaster Mage, the Mage's enters-the-battlefield trigger targets the original sorcery on the stack to copy it. Before that copy resolves, you use Phantom Train's activated ability to sacrifice the Dualcaster Mage, sending it straight to the graveyard. The resolved Exhume copy then brings that very same Dualcaster Mage right back to the battlefield, triggering its copy ability all over again to keep the chain unbroken.