Bloodthirsty Conqueror, and Professor Dellian Fel

Prerequisites

• Bloodthirsty Conqueror on the battlefield
• Professor Dellian Fel on the battlefield or in the graveyard

Steps

1. Gain life
2. Professor Dellian Fel's emblem triggers, causing an opponent to lose 1 life
3. Bloodthirsty Conqueror triggers, causing you to gain 1 life
4. Repeat from step 2

Results

• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss