When Faceless Butcher enters, its first ability triggers, exiling Metamorphosis Fanatic.
Activate Woe Strider by sacrificing Faceless Butcher.
When Faceless Butcher dies, its second ability triggers, returning Metamorphosis Fanatic from exile to the battlefield.
When Metamorphosis Fanatic enters, it triggers, returning Faceless Butcher from your graveyard to the battlefield.
When Faceless Butcher enters, its first ability triggers, exiling Metamorphosis Fanatic.
Resolve the Woe Strider ability.
Repeat from step 3.
This elegant loop turns a continuous cycle of life and death into an endless engine, fueled by the recursive interplay between Faceless Butcher and Metamorphosis Fanatic. When Faceless Butcher enters the battlefield to exile Metamorphosis Fanatic, you can sacrifice the Butcher to Woe Strider, whose sacrifice outlet not only lets you scry away unwanted draws but frees the Butcher from exile. This triggers Metamorphosis Fanatic to resurrect the Butcher straight from your graveyard, immediately exiling the Fanatic once more to reset the whole sequence. With Woe Strider's initial Goat token providing the first sacrifice fodder and the graveyard ready to sustain the loop, you generate an infinite stream of enters-the-battlefield, leaves-the-battlefield, and death triggers.