Olivia, Mobilized for War, Phantom Train, and Doom Weaver

Prerequisites

• Olivia, Mobilized for War on the battlefield
• Phantom Train on the battlefield
• Doom Weaver on the battlefield

Steps

1. Activate Phantom Train by sacrificing the persist creature
2. When the persist creature dies, its persist ability and the ability granted to it by Doom Weaver trigger
3. Resolve the trigger from the ability granted by Doom Weaver, causing you to draw a card
4. Resolve the persist trigger, returning the creature from your graveyard to the battlefield with a -1/-1 counter on it
5. When the persist creature enters the battlefield, Doom Weaver's soulbond ability and Olivia trigger
6. Resolve the Olivia trigger, putting a +1/+1 counter on the persist creature and causing you to discard a card
7. Resolve the Doom Weaver trigger, repairing it and the persist creature
8. Resolve the Phantom Train ability
9. Repeat

Results

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