Under the illumination of flares, what appeared before Yan Fei was a gigantic underwater mountain range. This underwater mountain range was tall and majestic, but its appearance was completely obscure and black. However, on the Drone Quantum Radar, Yan Fei discovered this underwater mountain range was the irregular object emitting metallic characteristics, the target Yan Fei was searching for this time — the core wreckage of the Space Fortress.