Reflections of Littjara triggers, copying the Astral Dragon spell.
Resolve the copy of the Astral Dragon spell, putting one token copy of Astral Dragon onto the battlefield (note this is not "created" so it is not doubled).
When the Astral Dragon token enters the battlefield, it triggers itself, creating four token copies of Parallel Lives that are 3/3 Dragon creatures in addition to their other types.
Resolve the original Astral Dragon spell from step 1.
When Astral Dragon enters the battlefield, it triggers, creating 64 token copies of Parallel Lives that are 3/3 Dragon creatures in addition to their other types.
This mesmerizing loop kicks off the moment you cast Astral Dragon, which immediately prompts Reflections of Littjara to copy the spell right onto the stack. When those dragons finally touch the battlefield, their entry triggers create a cascading multiplication of permanents. The true genius of the alchemy here lies in Parallel Lives, which sits quietly on the battlefield and exponentially magnifies the Dragon tokens, turning a modest handful of winged beasts into an overwhelming, game-winning swarm of sixty-four new token copies in a single explosive turn.