How can you create a combo with Time Sieve, Myr Battlesphere, Debtors' Knell?
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[START OF COMBO]This combo can be formed with Time Sieve, Myr Battlesphere, Debtors' Knell

Color identity: WUB
Mana cost: 
Steps:
  1. At the beginning of your upkeep, Debtors' Knell triggers, returning Myr Battlesphere from your graveyard to the battlefield.
  2. Myr Battlesphere enters the battlefield, creating four 1/1 Myr artifact creature tokens.
  3. Activate Time Sieve by tapping it, sacrificing Myr Battlesphere and the four Myr tokens, causing you to take an extra turn after this one.
  4. Repeat each turn.[END OF COMBO STEPS]

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

Other prerequisites:
  - Time Sieve must be on the battlefield
  - Myr Battlesphere must be in the graveyard
  - Debtors' Knell must be on the battlefield
[END OF COMBO PREREQUISITES]
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