Gravecrawler, Pitiless Plunderer, and Yahenni, Undying Partisan

Prerequisites

• Gravecrawler in the graveyard
• Pitiless Plunderer on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing Gravecrawler
2. When Gravecrawler dies, Pitiless Plunderer triggers, creating a Treasure token
3. Resolve the Yahenni ability
4. Activate the Treasure token by tapping and sacrificing it, adding
5. Cast Gravecrawler from your graveyard by paying
6. Repeat

Results

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