Exquisite Blood, and Marauding Blight-Priest

Prerequisites

• Exquisite Blood on the battlefield
• Marauding Blight-Priest on the battlefield
• You have a way to gain life

Steps

1. Gain life
2. Marauding Blight-Priest triggers, causing each opponent to lose 1 life
3. Exquisite Blood triggers for each opponent that lost life
4. Resolve a Exquisite Blood trigger, gaining 1 life
5. Repeat from step 2

Results

• Infinite lifegain triggers
• Infinite lifeloss
• Infinite lifegain