Preston, the Vanisher | Fiend Hunter | Flickerwisp

Cards

Cast
Flickerwisp by paying ({1} magic symbol) ({W} magic symbol) ({W} magic symbol) .
When
Flickerwisp enters the battlefield, it triggers, exiling
Fiend Hunter until the next end step.
When
Fiend Hunter leaves the battlefield, its second ability triggers, returning all cards exiled with it to the battlefield under their owner's control.
At the beginning of your end step,
Flickerwisp triggers, returning
Fiend Hunter from exile to the battlefield.
When
Fiend Hunter enters the battlefield, its first ability and
Preston trigger.
Resolve the
Fiend Hunter trigger, exiling
Flickerwisp.
Resolve the
Preston trigger, creating a copy of
Fiend Hunter that is a 0/1 Illusion.
When the token
Fiend Hunter enters the battlefield, its first ability triggers, exiling the nontoken
Fiend Hunter until the token
Fiend Hunter leaves the battlefield.
When the nontoken
Fiend Hunter leaves the battlefield, its second ability triggers, returning
Flickerwisp from exile to the battlefield.
When
Flickerwisp enters the battlefield, it and
Preston trigger, with
Flickerwisp targeting the
Fiend Hunter token.
Resolve the
Preston trigger, creating a token copy of
Flickerwisp that is a 0/1 Illusion.
When the token
Flickerwisp enters the battlefield, it triggers, exiling the
Fiend Hunter token.
When the token
Fiend Hunter leaves the battlefield, its second ability triggers, returning the nontoken
Fiend Hunter from exile to the battlefield.
Repeat from step 5.