Requires

Lagrella, the Magpie must be on the battlefield. Felidar Guardian must be in exile (exiled by Lagrella). Ephemerate must be in hand. Mana needed:

Steps

1. Cast Ephemerate by paying , blinking Lagrella.
2. Lagrella leaves the battlefield, causing Felidar Guardian to return to the battlefield from exile.
3. Lagrella and Felidar Guardian's enter-the-battlefield abilities trigger.
4. Resolve the Lagrella trigger, exiling Felidar Guarrdian until Lagrella leaves the battlefield.
5. Resolve the Felidar Guardian trigger, blinking Lagrella.
6. Repeat from step 2.

Results