How can you create a combo with Blossoming Tortoise, Dryad Arbor, Infinite Reflection, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Blossoming Tortoise, Dryad Arbor, Infinite Reflection, Phyrexian Altar

Color identity: GU
Mana cost: 
Steps:
  1. Play Dryad Arbor.
  2. When Dryad Arbor enters the battlefield as a copy of Blossoming Tortoise due to Infinite Reflection, it triggers.
  3. Holding priority, activate Phyrexian Altar by sacrificing Dryad Arbor, adding one mana of any color.
  4. Resolve the Dryad Arbor trigger from step 2, causing you to mill three cards and return Dryad Arbor from your graveyard to the battlefield.
  5. Repeat from step 2.[END OF COMBO STEPS]

Result:
  - 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:
  - Blossoming Tortoise must be on the battlefield
  - Dryad Arbor must be in your hand
  - Infinite Reflection must be on the battlefield
  - Phyrexian Altar must be on the battlefield
  - Infinite Reflection attached to Blossoming Tortoise.
[END OF COMBO PREREQUISITES]
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