How can you create a combo with Farid, Enterprising Salvager, Metalwork Colossus, Slagstone Refinery, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Farid, Enterprising Salvager, Metalwork Colossus, Slagstone Refinery, Ashnod's Altar

Color identity: R
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Metalwork Colossus, adding {C}{C}.
  2. When Metlwork Colossus dies, Slagstone Refinery and Farid trigger.
  3. Resolve the Slagstone Refinery trigger, creating a tapped Powerstone artifact token.
  4. Resolve the Farid trigger, creating a Scrap artifact token.
  5. Activate Metalwork Colossus by sacrificing the Powerstone token and the Scrap token, returning Metalwork Colossus from your graveyard to your hand.
  6. Cast Metalwork Colossus by paying at most {1}.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Noncreature artifacts you control have a combined mana value of ten or greater.
[END OF COMBO PREREQUISITES]
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