Endless Cockroaches, Pitiless Plunderer, Phyrexian Altar, and Jet Medallion

Prerequisites

• Endless Cockroaches on the battlefield
• Pitiless Plunderer on the battlefield
• Phyrexian Altar on the battlefield
• Jet Medallion on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Endless Cockroaches, adding
2. Endless Cockroaches dies, triggering itself and Pitiless Plunderer
3. Resolve the Endless Cockroaches trigger, returning it from your graveyard to your hand
4. Resolve the Pitiless Plunderer trigger, creating a Treasure token
5. Activate the Treasure by tapping and sacrificing it, adding
6. Cast Endless Cockroaches by paying
7. Repeat

Results

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