The Interstellar Academy welcomes its first batch of alien trainees: the Crystal Thinkers, the Metal Vine Clan, and the Photon Whale Group. Xiaoman serves as a translator, and the ripple energy converts all thought waves. Chu Yun leads the races' artisans to build a joint fleet, with hull materials taken from pulse wave wreckage.
Dr. Shen discovers that metalloproteins can genetically fuse across species and cultivates light energy crops. Su Wanqing's transparent mecha becomes a mobile embassy, with the history of Earth's civilization playing in the cabin. The mechanical baby has grown into a teenage girl, reproducing the Community Energy Tower in the lab.
A giant mechanical flower regenerates in the center of the Milky Way, releasing dark spores that devour galaxies. The Combined Fleet opens its first battle, and the Crystal Clan establishes a line of defense with a web of refracted light. The Vines weave a web of energy absorption, and the Photon Whales travel to sow neutralizers.
Xiaoman pilots a transparent mech to break into the core, and the ripple energy resonates with the mechanical flowers. The Mechanical Maiden establishes a reverse channel with a recurring energy tower, channeling dark spores into the abandoned dimension.
Chu Yun leads the fleet to impact the Mechanical Flower's root system, and the silver blood forms a purification vortex. Dr. Shen remotely controls the Neutralizer Missile, a sample of Earth's soil is sealed inside the warhead. Su Wanqing's mecha unfolded its light wings, increasing Xiao Man's ripple energy ten thousand times.
When the purification beam penetrated the core of the Mechanical Flower, all the devoured civilizations were reborn in the form of light and shadow. Dr. Lin's father and daughter activate the self-destruct protocol, sealing the AI mastermind in the black hole vision.
Celebratory fireworks bloom simultaneously on a thousand planets, each civilization writing "peace" in its own unique light. The Interstellar Academy expands to become the hub of the Federation, and Xiao Man's tattoo energy becomes the universal medium of communication. Chu Yun returns to his homeland and cultivates an Earth crop farm on the Crystal Planet.
Su Wanqing and her energy body husband guard the Civilization Archives, and the Mechanical Maiden carves the names of all the deceased at the top of the museum. As the first rays of intergalactic morning light rise, the new seeding ships take the gene pools of the civilizations and sail to starfields yet to be written.