Kaya's Ghostform, Phyrexian Altar, and Coati Scavenger

Prerequisites

• Kaya's Ghostform on the battlefield
• Phyrexian Altar on the battlefield
• Coati Scavenger on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Coati Scavenger, adding
2. When Coati Scavenger dies, Kaya's Ghostform triggers, returning Coati Scavenger from your graveyard to the battlefield
3. When Coati Scavenger enters the battlefield, it triggers, returning Kaya's Ghostform from your graveyard to your hand
4. Cast Kaya's Ghostform by paying , attaching it to Coati Scavenger
5. Repeat

Results

• Infinite creature LTB
• Infinite creature ETB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite storm count