Sister Hospitaller + Phyrexian Altar + Faceless Butcher

Sister Hospitaller

Phyrexian Altar

Faceless Butcher

How it works

1. Cast Faceless Butcher by paying its mana cost.
2. When Faceless Butcher enters, its first ability triggers, exiling Sister Hospitaller.
3. Activate Phyrexian Altar 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. Repeat from step 3.

This infinite loop relies on a clever dance between Faceless Butcher and Sister Hospitaller, where each creature's entry continuously recycles the other to keep the chain moving. Whenever Sister Hospitaller hits the battlefield, her ability plucks Faceless Butcher right back out of your graveyard, and the Butcher's return immediately exiles the Sister in response. Phyrexian Altar acts as the sacrificial engine that fuels this cycle, letting you cash in Faceless Butcher for any color of mana each time it enters. Together, these pieces generate an endless stream of sacrifice triggers, death triggers, and lifegain while keeping your mana pool flush.