How can you create a combo with Calamity, Galloping Inferno, Port Razer?
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[START OF COMBO]This combo can be formed with Calamity, Galloping Inferno, Port Razer

Color identity: R
Mana cost: 
Steps:
  1. Activate Calamity's saddle ability by tapping Port Razer, causing Calamity to become saddled until end of turn.
  2. Declare Calamity as an attacker.
  3. Calamity triggers, creating a tapped and attacking copy of Port Razer, and repeating the process once for any nonlegendary creature that saddled Calamity this turn.
  4. Deal combat damage using the Port Razer token(s).
  5. Each Port Razer who has not attacked the opponent this turn triggers, causing you to untap each creature you control and to get that many additional combat phases after this one.
  6. Repeat from step 2 each combat phase.[END OF COMBO STEPS]

Result:
  - Infinite combat damage
  - Infinite combat phases
  - Infinite copies of any nonlegendary creature that saddled Calamity this turn
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinite mana creatures you control can produce
  - Infinite untap of creatures you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - An opponent cannot block creatures you control.
[END OF COMBO PREREQUISITES]
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