Kaya's Ghostform, Phyrexian Altar, and Skullwinder

Prerequisites

• Kaya's Ghostform on the battlefield
• Phyrexian Altar on the battlefield
• Skullwinder on the battlefield

Steps

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

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count
• Target opponent returns all cards in their graveyard to their hand