Kaya's Ghostform, Phyrexian Altar, and Warden of the Eye

Prerequisites

• Kaya's Ghostform on the battlefield
• Phyrexian Altar on the battlefield
• Warden of the Eye on the battlefield
• Kaya's Ghostform attached to Warden of the Eye

Steps

1. Activate Phyrexian Altar by sacrificing Warden of the Eye, adding
2. When Warden of the Eye dies, Kaya's Ghostform triggers, returning Warden of the Eye from your graveyard to the battlefield
3. When Warden of the Eye 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 Warden of the Eye
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers