Lurrus of the Dream-Den, Kaya's Ghostform, Pitiless Plunderer, and Yahenni, Undying Partisan

Prerequisites

• Lurrus of the Dream-Den on the battlefield
• Kaya's Ghostform on the battlefield
• Pitiless Plunderer on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

1. Activate Yahenni by sacrificing Lurrus of the Dream-Den
2. When Lurrus of the Dream-Den dies, Kaya's Ghostform and Pitiless Plunderer trigger
3. Resolve the Kaya's Ghostform trigger, returning Lurrus of the Dream-Den from your graveyard to the battlefield
4. Resolve the Pitiless Plunderer trigger, creating a Treasure token
5. Resolve the Yahenni ability, giving it indestructible until end of turn
6. Activate the Treasure by tapping and sacrificing it, adding
7. Cast Kaya's Ghostform from your graveyard by paying , attaching it to Lurrus of the Dream-Den
8. Repeat

Results

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