Lagrella, the Magpie + Yannik, Scavenging Sentinel + Phantom Steed

Lagrella, the Magpie

Yannik, Scavenging Sentinel

Phantom Steed

How it works

1. Cast Lagrella by paying and commander tax, if applicable.
2. Lagrella enters the battlefield, exiling Phantom Steed.
3. Phantom Steed leaves the battlefield, causing Yannik to be returned to the battlefield from exile.
4. Yannik enters the battlefield, exiling Lagrella and distributing two +1/+1 counters among any number of target creatures.
5. If Lagrella is your commander, choose not to return it to the command zone.
6. Lagrella leaves the battlefield, causing Phantom Steed to be returned to the battlefield from exile with two +1/+1 counters on it.
7. Phantom Steed enters the battlefield, exiling Yannik.
8. Yannik leaves the battlefield, causing Lagrella to be returned to the battlefield from exile.
9. Repeat from step 2.