Shilgengar, Sire of Famine, Sister Hospitaller, and Faceless Butcher

Prerequisites

• Shilgengar, Sire of Famine on the battlefield
• Sister Hospitaller on the battlefield
• Faceless Butcher in hand
• available

Steps

1. Cast Faceless Butcher by paying its mana cost
2. When Faceless Butcher enters, its first ability triggers, exiling Sister Hospitaller
3. Activate Shilgengar by sacrificing Faceless Butcher
4. When Faceless Butcher dies, its second ability triggers, returning Sister Hospitaller from exile to the battlefield
5. When Sister Hospitaller enters, it triggers, returning Faceless Butcher from your graveyard to the battlefield
6. When Faceless Butcher enters, its first ability triggers, exiling Sister Hospitaller
7. Resolve the Shilgengar ability
8. Repeat from step 3

Results

• Infinite lifegain
• Infinite lifegain triggers
• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite Blood tokens