Loyal Retainers, Marvin, Murderous Mimic, and Sakashima the Impostor

Prerequisites

• Loyal Retainers on the battlefield
• Marvin, Murderous Mimic on the battlefield
• Sakashima the Impostor in the graveyard

Steps

1. Activate Marvin by sacrificing it, returning Sakashima the Impostor from your graveyard to the battlefield as a copy of Loyal Retainers
2. Activate Sakashima the Impostor by sacrificing it, returning Marvin from your graveyard to the battlefield as a copy of Loyal Retainers
3. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers