How can you create a combo with Old Gnawbone, Time Sieve?
user
[START OF COMBO]This combo can be formed with Old Gnawbone, Time Sieve

Color identity: BGU
Mana cost: 
Steps:
  1. Deal combat damage to an opponent with Old Gnawbone.
  2. Old Gnawbone triggers, creating seven Treasure tokens.
  3. Activate Time Sieve by tapping it and sacrificing five Treasure 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:
  - All permanants must be on the battlefield
  - Old Gnawbone does not have summoning sickness.
  - An opponent is unable to block and kill Old Gnawbone.
[END OF COMBO PREREQUISITES]
assistant