Cole’s knuckles whitened as he gripped the Abyssal Standard Tactical Dagger🔪, the shrill wail of the external pressure alarm blaring through the cramped submersible cabin⚠️. In 2197, he served in the Earth Federation's Deep Space Submersible Unit, stationed at the Kraken Trench Observatory on Titan — a forward outpost tasked with detecting extraterrestrial deep-sea organisms🌊. Three days prior, the observatory’s sonar picked up signals of an unrecorded arthropod-like creature, its movement speed far exceeding any known deep-sea species. Last night, it destroyed the No.3 outer module. This dagger was the base's emergency weapon, 3D-printed from high-density polymer materials, with guide grooves on the blade to reduce water resistance under high pressure, and anti-slip patterns on the grip designed to fit the thick pressure-resistant gloves of submersible crew🤚. Cole watched the stress cracks on the cabin door expand, the fluorescent blue blade glinting coldly under the emergency lights. He wondered if this non-lethal weapon could fend off the unknown creature, until he saw a glow of the same cyan hue as the dagger, flickering in the shadow outside the cabin door👁️. As the creature’s outline became clear outside the hatch, Cole suddenly realized that the dagger was made from samples collected from this very trench, and now, the sample seemed to be resonating with the creature. His finger hovered over the cabin’s emergency purge button, the blue glow on the dagger growing brighter, pulsing in sync with the lights in the creature’s eyes — no one knew what would happen next.