How can you create a combo with Lagrella, the Magpie, Yannik, Scavenging Sentinel, Phantom Steed?
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[START OF COMBO]This combo can be formed with Lagrella, the Magpie, Yannik, Scavenging Sentinel, Phantom Steed

Color identity: GWU
Mana cost: {G}{W}{U} plus enough mana to pay for commander tax, if applicable
Steps:
  1. Cast Lagrella by paying {G}{W}{U} 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.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Lagrella, the Magpie must be in your hand or in the command zone
  - Yannik, Scavenging Sentinel must be exiled
  - Phantom Steed must be on the battlefield
[END OF COMBO PREREQUISITES]
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