In 2419, inside the cryogenic training pod of the 7th Interstellar Marine Corps frontier outpost🌌, recruit Kael grips the "Abyss Star Tactical Training Blade" and repeatedly slashes at holographic targets. This 3D-printed training blade is made of the latest memory bionic polymer, which perfectly replicates the center of gravity and grip damping of standard combat daggers, and is equipped with a neural synchronization module that can feed back real cutting stress and puncture resistance to the user's neural interface during simulated training⚙️. During a simulated assault mission on an abandoned research station, Kael's blade accidentally hit an unmarked metal wreckage in the holographic projection, triggering the hidden encrypted chip in the handle. An encrypted log from the missing "Abyss Vanguard" squad a century prior popped up on his tactical goggles📜: "The boundaries of the Abyss Rift are seeping through, they are mimicking the structure of our weapons. Do not let any training blade come into contact with the rift's adherents..." Just as he tried to crack the full content of the log, the base's global alarm blared🔊, and sharp scraping sounds echoed against the titanium alloy hull outside. The environmental monitoring module on his tactical goggles showed that an unknown bionic polymer signal appeared in the atmosphere outside the pod. The blue training blade in his hand began to vibrate at a frequency far exceeding the normal training vibration amplitude, and a faint blue fluorescence, which resonated with the rift's adherents, seemed to seep out from the texture of the blade👾. He suddenly looked up, and outside the one-way observation window of the training pod, a blurry shadow almost identical in outline to the training blade was pressed against the glass, writhing slowly.