Sakashima of a Thousand Faces in exile (exiled by Wormfang Drake).
({2} magic symbol) ({U} magic symbol) available.
Steps
Cast Mirror Image by paying ({2} magic symbol) ({U} magic symbol) , choosing to have it enter the battlefield as a copy of Wormfang Drake.
When Mirror Image enters the battlefield, its first ability triggers, exiling Wormfang Drake.
When Wormfang Drake leaves the battlefield, its second ability triggers, returning Sakashima to the battlefield as a copy of Mirror Image, thus making it a copy of Wormfang Drake.
When Sakashima enters the battlefield, its first ability triggers, exiling Mirror Image.
When Mirror Image leaves the battlefield, its second ability triggers, returning Wormfang Drake from exile to the battlefield.
When Wormfang Drake enters the battlefield, its first ability triggers, exiling Sakashima.
When Sakashima leaves the battlefield, its second ability triggers, returning Mirror Image to the battlefield as a copy of Wormfang Drake.