Faceless Butcher | Dual Nature

Cards

Cast
Faceless Butcher by paying ({2} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Faceless Butcher enters the battlefield, triggering itself and
Dual Nature's first ability.
Resolve the
Faceless Butcher trigger, choosing not to exile anything.
Resolve the
Dual Nature trigger, creating a token copy of
Faceless Butcher.
The token
Faceless Butcher enters the battlefield, exiling the nontoken
Faceless Butcher.
Faceless Butcher leaves the battlefield, triggering
Dual Nature's second ability, exiling the
Faceless Butcher token.
The
Faceless Butcher token leaves the battlefield, triggering its second ability, returning the nontoken
Faceless Butcher from exile to the battlefield.
Repeat from step 2.