How can you create a combo with Yannik, Scavenging Sentinel, Lumbering Battlement, Felidar Guardian?
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[START OF COMBO]This combo can be formed with Yannik, Scavenging Sentinel, Lumbering Battlement, Felidar Guardian

Color identity: GW
Mana cost: {6}{G}{W}{W} plus enough mana to pay for commander tax, if applicable
Steps:
  1. Cast Yannik either from your hand or from the command zone by paying {2}{G}{W} plus commander tax, if applicable.
  2. Yannik enters the battlefield, exiling Felidar Guardian and putting a +1/+1 counter on any other creature you control.
  3. Cast Lumbering Battlement by paying {4}{W}.
  4. Lumbering Battlement enters the battlefield, exiling Yannik.
  5. Yannik leaves the battlefield, returning Felidar Guardian from exile to the battlefield.
  6. Felidar Guardian enters the battlefield, blinking Lumbering Battlement.
  7. Lumbering Battlement leaves and enters the battlefield, returning Yannik from exile to the battlefield, and triggering Lumbering Battlement's enters-the-battlefield ability.
  8. Yannik enters the battlefield, exiling Felidar Guardian and putting a +1/+1 counter on any other creature you control.
  9. Resolve the Lumbering Battlement trigger, exiling Yannik.
  10. Repeat from step 5.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on all other creatures you control
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Yannik, Scavenging Sentinel must be in your hand or in the command zone
  - Lumbering Battlement must be in your hand
  - Felidar Guardian must be on the battlefield
[END OF COMBO PREREQUISITES]
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