Karn, Silver Golem, Pitiless Plunderer, Ashnod's Altar, and Elesh Norn, Grand Cenobite

Prerequisites

• Karn, Silver Golem on the battlefield
• Pitiless Plunderer on the battlefield
• Ashnod's Altar on the battlefield
• Elesh Norn, Grand Cenobite on the battlefield
• You control at least one additional creature

Steps

1. Activate Ashnod's Altar by sacrificing another creature, adding
2. The creature dies, triggering Pitiless Plunderer, creating a Treasure token
3. Activate Karn by paying , causing the Treasure to become a 2/2 artifact creature until end of turn
4. Repeat

Results

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