Astral Dragon enters the battlefield, creating two token copies of Journey to Nowhere that are 3/3 Dragons in addition to their other types.
The Journey to Nowhere tokens enter the battlefield, triggering their first abilities.
Resolve the first Journey to Nowhere token's trigger, exiling Astral Dragon.
Resolve the second Journey to Nowhere token's trigger, exiling the first Journey to Nowhere token.The first Journey to Nowhere token leaves the battlefield, returning Astral Dragon from exile to the battlefield.