Decaying Soil, Cathodion, and Phyrexian Altar

Prerequisites

• Decaying Soil on the battlefield
• Cathodion on the battlefield
• Phyrexian Altar on the battlefield
• You have seven or more cards in your graveyard

Steps

1. Activate Phyrexian Altar by sacrificing Cathodion, adding
2. Cathodion dies, triggering itself and Decaying Soil
3. Resolve the Cathodion trigger, adding
4. Resolve the Decaying Soil trigger, causing you to pay to return Cathodion from your graveyard to your hand
5. Cast Cathodion by paying
6. Repeat

Results

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