Farid, Enterprising Salvager, Metalwork Colossus, Slagstone Refinery, and Ashnod's Altar

Prerequisites

• Farid, Enterprising Salvager on the battlefield
• Metalwork Colossus on the battlefield
• Slagstone Refinery on the battlefield
• Ashnod's Altar on the battlefield
• Noncreature artifacts you control have a combined mana value of ten or greater

Steps

1. Activate Ashnod's Altar by sacrificing Metalwork Colossus, adding
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
7. Repeat

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count