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

Color identity: G
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing Woodfall Primus.
  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.
  7. Resolve all Altar of Dementia's abilities, causing target player to mill cards equal to Woodfall Primus' power.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Destroy any number of noncreature permanents
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[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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