Dualcaster Mage + Reunion of the House + Phantom Train

Dualcaster Mage

Reunion of the House

Phantom Train

How it works

1. Cast Reunion of the House by paying 5.
2. Holding priority, cast Dualcaster Mage by paying 1.
3. When Dualcaster Mage enters the battlefield, it triggers, targeting Reunion of the House.
4. Holding priority, activate Phantom Train by sacrificing Dualcaster Mage.
5. Resolve the Dualcaster Mage trigger, copying Reunion of the House, targeting Dualcaster Mage and any other creature(s) as desired.
6. Resolve the copy of Reunion of the House, returning the targeted creatures from your graveyard to the battlefield.
7. Repeat from step 3.

This ingenious loop begins by casting Reunion of the House to target creatures in your graveyard, and then interrupting it by flashing in Dualcaster Mage to copy the spell while it's still on the stack. Before that copy can resolve, you feed Dualcaster Mage to Phantom Train's sacrifice ability to turn the Vehicle into a creature while growing it with a +1/+1 counter. Because the original Dualcaster Mage is now safely in your graveyard alongside whatever creatures you choose, the copied Reunion of the House can return both of them to the battlefield—bringing Dualcaster Mage right back to copy the spell all over again.