How can you create a combo with Melira, Sylvok Outcast, Woodfall Primus, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Melira, Sylvok Outcast, Woodfall Primus, Phyrexian Altar

Color identity: G
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrificing Woodfall Primus, adding one mana of any color.
  2. Woodfall Primus's persist ability triggers, returning it to the battlefield.
  3. Woodfall Primus enters the battlefield, triggering its ability.
  4. Holding priority, repeat an arbitrarily large number of times.
  5. Resolve all Woodfall Primus abilities, destroying any number of noncreature permanents.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Destroy any number of noncreature permanents
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Woodfall Primus does not have a -1/-1 counters on it.
[END OF COMBO PREREQUISITES]
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