Metalwork Colossus + Pitiless Plunderer + Slagstone Refinery + Ashnod's Altar

Prerequisites

• Noncreature artifacts you control have a combined mana value of ten or greater.

Steps

1. 1Activate Ashnod's Altar by sacrificing Metalwork Colossus, adding .
2. 2When Metlwork Colossus dies, Slagstone Refinery and Pitiless Plunderer trigger.
3. 3Resolve the Slagstone Refinery trigger, creating a tapped Powerstone artifact creature token.
4. 4Resolve the Pitiless Plunderer trigger, creating a Treasure artifact token.
5. 5Activate Metalwork Colossus by sacrificing the Powerstone token and the Treasure token, returning Metalwork Colossus from your graveyard to your hand.
6. 6Cast Metalwork Colossus by paying at most .
7. 7Repeat.

Effects

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