How can you create a combo with Time Sieve, Descent into Avernus, Circle of Protection: Red?
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[START OF COMBO]This combo can be formed with Time Sieve, Descent into Avernus, Circle of Protection: Red

Color identity: WUBR
Mana cost: {1} each turn
Steps:
  1. At the beginning of your upkeep, Descent into Avernus triggers.
  2. Holding priority, activate Circle of Protection: Red by paying {1}, preventing the next amount of damage Descent into Avernus would deal you this turn.
  3. Resolve the Descent into Avernus trigger, putting two descent counters on it, then causing each player to create a number of Treasure tokens equal to the number of descent counters on Descent into Avernus, and causing each opponent to be dealt an amount of damage equal to the number of descent counters on Descent into Avernus.
  4. Activate Time Sieve by tapping it and sacrificing five Treasures, causing you to take an extra turn after this one.
  5. Repeat each turn.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Descent into Avernus has at least four descent counters on it.
[END OF COMBO PREREQUISITES]
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