Dogmeat, Ever Loyal, Kaya's Ghostform, and Phyrexian Altar

Prerequisites

• Dogmeat, Ever Loyal on the battlefield
• Kaya's Ghostform on the battlefield
• Phyrexian Altar on the battlefield
• Kaya's Ghostform attached to Dogmeat

Steps

1. Activate Phyrexian Altar by sacrificing Dogmeat, adding
2. When Dogmeat dies, Kaya's Ghostform triggers, returning Dogmeat to the battlefield from your graveyard
3. When Dogmeat enters the battlefield, its first ability triggers, causing you to mill five cards and return Kaya's Ghostform to your hand from your graveyard
4. Cast Kaya's Ghostform by paying , attaching it to Dogmeat
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite storm count