Melira, Sylvok Outcast, and Phantom Train

Prerequisites

• Melira, Sylvok Outcast on the battlefield
• Phantom Train on the battlefield

Steps

1. Activate Phantom Train by sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning the creature from your graveyard to the battlefield without a -1/-1 counter on it due to Melira
3. Resolve the Phantom Train ability
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite +1/+1 counters on a creature