Sister Hospitaller + Altar of Dementia + Faceless Butcher

Sister Hospitaller

Altar of Dementia

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 Altar of Dementia 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 Altar of Dementia ability.
8. Repeat from step 3.

This cunning loop relies on an infinite cycle of exile and sacrifice to grind your opponents down to nothing. You initiate the chain by casting Faceless Butcher, whose enter-the-battlefield trigger exiles Sister Hospitaller, only to immediately sacrifice the Butcher to Altar of Dementia. That death triggers the Butcher's second ability to bring Sister Hospitaller back, which in turn triggers the Sister's *Medicus Ministorum* ability to drag Faceless Butcher straight out of the graveyard and back onto the battlefield. Because Altar of Dementia converts every iteration of this sacrifice loop into a massive wave of target player milling, you can easily mill out your entire table while continuously triggering lifegain and death triggers along the way.