Mortuary, Pitiless Plunderer, Yahenni, Undying Partisan, and Elven Chorus

Prerequisites

• Mortuary on the battlefield
• Pitiless Plunderer on the battlefield
• Yahenni, Undying Partisan on the battlefield
• Elven Chorus on the battlefield

Steps

1. Activate Yahenni by sacrificing the nontoken creature
2. When the creature dies, Mortuary and Pitiless Plunderer trigger
3. Resolve the Mortuary trigger, putting the creature from your graveyard onto the top of your library
4. Resolve the Pitiless Plunderer trigger, creating a Treasure token
5. Resolve the Yahenni ability
6. Activate the Treasure by tapping and sacrificing it, adding one mana of any color
7. Cast the creature from the top of your library by paying its mana cost Repeat

Results

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