Kaya's Ghostform, Phyrexian Altar, and White Widow, Free Agent

Prerequisites

• Kaya's Ghostform on the battlefield
• Phyrexian Altar on the battlefield
• White Widow, Free Agent on the battlefield

Steps

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

Results

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