Harvester of Souls + Olivia, Mobilized for War + Phantom Train

BR identity

Commander legal

The 3 combo pieces

• Harvester of Souls
• Olivia, Mobilized for War
• Phantom Train

How to execute it

1. Activate Phantom Train 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 Phantom Train ability.
7. Repeat.

What the combo produces

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