How can you create a combo with Boonweaver Giant, Gift of Immortality, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Boonweaver Giant, Gift of Immortality, Phyrexian Altar

Color identity: W
Mana cost: {6}{W}
Steps:
  1. Cast Boonweaver Giant.
  2. Search your graveyard, hand, or library for Gift of Immortality and attach it to Boonweaver Giant.
  3. Sacrifice Boonweaver Giant to Phyrexian Altar.
  4. Gift of Immortality triggers.
  5. Return Boonweaver Giant from your graveyard to the battlefield.
  6. When Boonweaver Giant enters the battlefield, search your graveyard for Gift of Immortality and attach it to Boonweaver giant.
  7. Sacrifice Boonweaver Giant to Phyrexian Altar.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite colored mana
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Boonweaver Giant must be in your hand
  - Gift of Immortality must be in your hand or in the graveyard or in the library
  - Phyrexian Altar must be on the battlefield
[END OF COMBO PREREQUISITES]
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