How can you create a combo with Lumra, Bellow of the Woods, Port of Karfell, Amulet of Vigor, Overgrown Estate?
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[START OF COMBO]This combo can be formed with Lumra, Bellow of the Woods, Port of Karfell, Amulet of Vigor, Overgrown Estate

Color identity: GWUB
Mana cost: 
Steps:
  1. Activate any number of other lands you control by tapping them, adding at least {3}{U}{B}{B}.
  2. Activate Overgrown Estate by sacrificing a land other than Port of Karfell, causing you to gain 3 life.
  3. Repeat step 2 until you control no other lands except Port of Karfell.
  4. Activate Port of Karfell's second ability by paying {3}{U}{B}{B}, tapping and sacrificing it, causing you to mill four cards and return Lumra from your graveyard to the battlefield tapped.
  5. Lumra enters the battlefield and dies as a state-based action due to having 0 toughness.
  6. Lumra's enter-the-battlefield ability triggers, causing you to mill four cards and return all land cards from your graveyard to the battlefield tapped.
  7. When the lands enter the battlefield, Amulet of Vigor triggers that many times, untapping the lands.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite landfall triggers
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite leaves the battlefield
  - Infinite mana lands you control can produce
  - Infinite sacrifice triggers
  - Infinite self-mill
  - Put all land cards from your library and graveyard onto the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Lumra, Bellow of the Woods must be in the graveyard
  - Port of Karfell must be on the battlefield
  - Amulet of Vigor must be on the battlefield
  - Overgrown Estate must be on the battlefield
  - Lands you control excluding Port of Karfell can tap to produce at least {3}{U}{B}{B}.
[END OF COMBO PREREQUISITES]
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