How can you create a combo with Greven, Predator Captain, Fire Covenant?
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[START OF COMBO]This combo can be formed with Greven, Predator Captain, Fire Covenant

Color identity: BR
Mana cost: {1}{B}{R}
Steps:
  1. Cast Fire Covenant by paying {1}{B}{R} and 16 life, dealing 16 damage divided among any number of creatures and causing Greven to become a 21/21 until end of turn due to its first ability.
  2. Deal combat damage to an opponent using Greven.
  3. The opponent loses the game due to being dealt 21 combat damage from your commander.[END OF COMBO STEPS]

Result:
  - Target opponent loses the game[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Greven, Predator Captain must be on the battlefield
  - Fire Covenant must be in your hand
  - Greven does not have summoning sickness and cannot be blocked by an opponent.
  - Greven is your commander.
  - Your life total is at least 17.
  - There is at least one additional creature on the battlefield.
[END OF COMBO PREREQUISITES]
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