Olivia, Mobilized for War, Harvester of Souls, and Hammerhead, Maggia Boss

Prerequisites

• Olivia, Mobilized for War on the battlefield
• Harvester of Souls on the battlefield
• Hammerhead, Maggia Boss on the battlefield

Steps

1. Activate Hammerhead by sacrificing the persist creature
2. When the persist creature dies, it and Harvester of Souls trigger
3. Resolve the Harvester of Souls 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 Hammerhead ability
7. Repeat

Results

• Infinite draw triggers
• Infinite looting
• Infinite self-discard triggers
• Near-infinite +1/+1 counters on a creature
• Near-infinite creature ETB
• Near-infinite creature LTB
• Near-infinite creature sacrifice triggers
• Near-infinite death triggers