Phyrexian Devourer, Beacon of Immortality, and Bolas's Citadel

Prerequisites

• Phyrexian Devourer on the battlefield
• Beacon of Immortality in hand or in the library
• Bolas's Citadel on the battlefield
• available

Steps

1. Activate Phyrexian Devourer by exiling a card from your library
2. Repeat step 1 until your library is empty
3. Cast Beacon of Immortality by paying , doubling your life total and shuffling it into your library
4. Cast Beacon of Immortality from the top of your library by paying 6 life, doubling your life total and shuffling it into your library
5. Repeat step 4

Results

• Exile your library
• Infinite lifegain
• Infinite lifegain triggers
• Infinite magecraft triggers
• Infinite storm count