Priest of Gix, Nim Deathmantle, and Phyrexian Altar

Prerequisites

• Priest of Gix on the battlefield
• Nim Deathmantle on the battlefield
• Phyrexian Altar on the battlefield
• available

Steps

1. Activate Phyrexian Altar by sacrificing Priest of Gix adding one mana of any color
2. Priest of Gix dies, triggering Nim Deathmantle, causing you to pay to return Priest of Gix from your graveyard to the battlefield, and attach Nim Deathmantle to it
3. Priest of Gix enters the battlefield, adding
4. Repeat

Results

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