Metalwork Colossus, Slagstone Refinery, Sly Requisitioner, and Krark-Clan Ironworks

Prerequisites

• Metalwork Colossus on the battlefield
• Slagstone Refinery on the battlefield
• Sly Requisitioner on the battlefield
• Krark-Clan Ironworks on the battlefield

Steps

1. Activate Krark-Clan Ironworks by sacrificing Metalwork Colossus, adding
2. When Metlwork Colossus dies, Sly Requisitioner and Slagstone Refinery trigger
3. Resolve the Sly Requisitioner trigger, creating a 1/1 Servo artifact creature token
4. Resolve the Slagstone Refinery trigger, creating a tapped Powerstone artifact token
5. Activate Metalwork Colossus by sacrificing the Servo and the Powerstone 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