How can you create a combo with Lagrella, the Magpie, Sun Titan, Preston, the Vanisher, Ghostly Flicker?
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[START OF COMBO]This combo can be formed with Lagrella, the Magpie, Sun Titan, Preston, the Vanisher, Ghostly Flicker

Color identity: GWU
Mana cost: {2}{U}
Steps:
  1. Cast Ghostly Flicker by paying {2}{U}, blinking Lagrella and any other artifact, creature or land you control.
  2. When Lagrella enters the battlefield, it and Preston triggers.
  3. Resolve the Lagrella trigger, exiling Sun Titan until Lagrella leaves the battlefield.
  4. Resolve the Preston trigger, creating a token copy of Lagrella that is a 0/1 Illusion.
  5. Put the nontoken Lagrella into your graveyard due to the legend rule.
  6. If Lagrella is your commander, choose not to return it to the command zone from your graveyard.
  7. When Lagrella leaves the battlefield, Sun Titan is returned to the battlefield from exile.
  8. Sun Titan, Lagrella and Preston each trigger.
  9. Resolve the Preston trigger, creating a token copy of Sun Titan that is a 0/1 Illusion.
  10. When the Sun Titan token enters the battlefield, it triggers, choosing to return nothing to the battlefield.
  11. Resolve the Lagrella trigger, putting two +1/+1 counters on the nontoken Sun Titan.
  12. Resolve the Sun Titan trigger from step 8, returning Lagrella from your graveyard to the battlefield.
  13. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Lagrella, the Magpie must be on the battlefield
  - Sun Titan must be on the battlefield
  - Preston, the Vanisher must be on the battlefield
  - Ghostly Flicker must be in your hand
[END OF COMBO PREREQUISITES]
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