Hell's Caretaker, Body Double, and Tannuk, Steadfast Second

Prerequisites

• Hell's Caretaker on the battlefield
• Body Double in the graveyard
• Tannuk, Steadfast Second on the battlefield

Steps

1. During your upkeep, activate Hell's Caretaker by tapping and sacrificing it, returning Body Double from your graveyard to the battlefield as a copy of Hell's Caretaker
2. Activate Body Double by tapping and sacrificing it, returning Hell's Caretaker from your graveyard to the battlefield
3. Repeat

Results

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