Sister Hospitaller, Carrion Feeder, and Fiend Hunter

Prerequisites

• Sister Hospitaller in hand
• Carrion Feeder on the battlefield
• Fiend Hunter in the graveyard
• available

Steps

1. Cast Sister Hospitaller by paying
2. When Sister Hospitaller enters, it triggers, returning Fiend Hunter from your graveyard to the battlefield and causing you to gain life equal to its mana value
3. When Fiend Hunter enters, it triggers, exiling Sister Hospitaller
4. Activate Carrion Feeder by sacrificing Fiend Hunter
5. When Fiend Hunter dies, it triggers, returning Sister Hospitaller from exile to the battlefield
6. Repeat from step 2
7. Resolve all Carrion Feeder abilities

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain
• Infinite +1/+1 counters on Carrion Feeder