How can you create a combo with Donna Noble, Boros Reckoner?
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[START OF COMBO]This combo can be formed with Donna Noble, Boros Reckoner

Color identity: RW
Mana cost: 
Steps:
  1. Give Boros Reckoner indestructible, if needed, and then deal damage to it.
  2. Donna Noble and Boros Reckoner trigger.
  3. Resolve the Donna Noble trigger, dealing that much damage to an opponent.
  4. Resolve the Boros Reckoner trigger, dealing that much damage to itself.
  5. Repeat from step 2.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Donna Noble is paired with Boros Reckoner.
  - You have a way to give Boros Reckoner indestructible.
  - You have a way to deal damage to Boros Reckoner.
[END OF COMBO PREREQUISITES]
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