How can you create a combo with Polyraptor, Forerunner of the Empire, Cathars' Crusade?
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[START OF COMBO]This combo can be formed with Polyraptor, Forerunner of the Empire, Cathars' Crusade

Color identity: RGW
Mana cost: 
Steps:
  1. Deal damage to Polyraptor.
  2. Polyraptor triggers, creating a token copy of it.
  3. The Polyraptor token enters the battlefield, triggering Forerunner of the Empire's second ability and Cathars' Crusade.
  4. Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control.
  5. Resolve the Forerunner of the Empire trigger, dealing 1 damage to each creature.
  6. Each Polyraptor you control triggers.
  7. Resolve a Polyraptor trigger, creating a token copy of it.
  8. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters
  - Infinite creature tokens
  - Infinite damage to all creatures
  - Infinite damage to creatures
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have a way to deal damage to Polyraptor.
[END OF COMBO PREREQUISITES]
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