How can you create a combo with Time Vault, Derevi, Empyrial Tactician?
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[START OF COMBO]This combo can be formed with Time Vault, Derevi, Empyrial Tactician

Color identity: GWU
Mana cost: 
Steps:
  1. Attack with Derevi.
  2. Derevi triggers upon dealing combat damage, untapping Time Vault.
  3. Tap Time Vault to take an extra turn after this one.
  4. Repeat for infinite turns.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Derevi does not have summoning sickness.
  - Opponents can not block Derevi.
[END OF COMBO PREREQUISITES]
assistant