Dualcaster Mage + Cloudshift

Dualcaster Mage

Cloudshift

How it works

1. Cast Cloudshift by paying its mana cost.
2. Holding priority, cast Dualcaster Mage by paying its mana cost.
3. When Dualcaster Mage enters, it triggers, copying Cloudshift, with the copy targeting Dualcaster Mage.
4. Resolve the copy of Cloudshift, blinking Dualcaster Mage.
5. Repeat from step 3.