Atla Palani, Nest Tender, Phantom Train, and Leyline of Transformation

Prerequisites

• Atla Palani, Nest Tender on the battlefield
• Phantom Train on the battlefield
• Leyline of Transformation on the battlefield

Steps

1. Activate Phantom Train by sacrificing another creature
2. When the creature dies as an Egg due to Leyline of Transformation, Atla triggers, revealing a creature card from your library and putting it onto the battlefield
3. Resolve the Phantom Train ability
4. Repeat as desired / able

Results

• Near-infinite +1/+1 counters on a creature
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite death triggers
• Near-infinite sacrifice triggers
• Put all creature cards in your library onto the battlefield, then into your graveyard