Olivia, Mobilized for War, High-Society Hunter, and Yahenni, Undying Partisan

Prerequisites

• Olivia, Mobilized for War on the battlefield
• High-Society Hunter on the battlefield
• Yahenni, Undying Partisan on the battlefield
• The persist creature does not have a -1/-1 counter on it

Steps

1. Activate Yahenni by sacrificing the persist creature
2. When the persist creature dies, it and High-Society Hunter trigger
3. Resolve the High-Society Hunter trigger, causing you to draw a card
4. Resolve the persist creature's trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it
5. When the persist creature enters the battlefield, Olivia triggers, putting a +1/+1 counter on the persist creature and causing you to discard a card
6. Resolve the Yahenni ability
7. Repeat

Results

• Near-infinite ETB
• Infinite draw triggers
• Infinite looting
• Near-infinite LTB
• Near-infinite death triggers
• Near infinite sacrifice triggers
• Infinite self-discard triggers