This is a translation so I guess we'll see what the official English wording is, but it sounds like this uses the old Mesmeric Fiend-style templating, which means you can exile something permanently if you flicker this creature with its ETB trigger on the stack. It would have to be that way, I think, to let you get your own exiled creature back too.
But casting a six-mana creature and then being able to flicker it right away is a lot to ask. More likely we'll see people reanimating this, or possibly doing Smuggler's Surprise-type tricks, to get around having to exile their own creature.
