The Master, Formed Anew, Cavalier of Night, and Yahenni, Undying Partisan

Prerequisites

• The Master, Formed Anew on the battlefield
• Cavalier of Night in exile
• Yahenni, Undying Partisan on the battlefield
• Cavalier of Night in exile with a takeover counter on it
• The Master on the battlefield as a copy of Cavalier of Night
• available

Steps

1. Activate Yahenni by sacrificing The Master
2. When The Master dies, its second ability triggers, returning itself from your graveyard to the battlefield as a copy of Cavalier of Night
3. When The Master enters the battlefield, its first ability triggers, doing nothing
4. Resolve the Yahenni ability, giving it indestructible until end of turn
5. Repeat

Results

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