Kalastria Highborn, Mortuary, Phyrexian Altar, and Bolas's Citadel

Prerequisites

• Kalastria Highborn on the battlefield
• Mortuary on the battlefield
• Phyrexian Altar on the battlefield
• Bolas's Citadel on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Kalastria Highborn, adding
2. When Kalastria Highborn dies, it and Mortuary trigger
3. Resolve the Kalastria Highborn trigger, causing you to pay to have an opponent lose 2 life and you to gain 2 life
4. Resolve the Mortuary trigger, putting Kalastria Highborn from your graveyard onto the top of your library
5. Cast Kalastria Highborn from the top of your library by paying 2 life
6. Repeat

Results

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