How can you create a combo with Pattern of Rebirth, The Cauldron of Eternity, Boonweaver Giant, Altar of Dementia?
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[START OF COMBO]This combo can be formed with Pattern of Rebirth, The Cauldron of Eternity, Boonweaver Giant, Altar of Dementia

Color identity: WBG
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing Boonweaver Giant.
  2. When Boonweaver Giant dies, The Cauldron of Eternity and Pattern of Rebirth trigger.
  3. Resolve the Cauldron of Eternity trigger, putting Boonweaver Giant on the bottom of your library from your graveyard.
  4. Resolve the Pattern of Rebirth trigger, putting Boonweaver Giant from your library onto the battlefield.
  5. When Boonweaver Giant enters the battlefield, it triggers, returning Pattern of Rebirth from your graveyard to the battlefield attached to Boonweaver Giant.
  6. Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Boonweaver Giant's power.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - 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
  - Pattern of Rebirth attached to Boonweaver Giant.
[END OF COMBO PREREQUISITES]
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