The Voice of the Abyss (слэш)

During Mobei-jun's daring attack on the Immortal Alliance Conference, Shen Jiu and Luo Binghe tumble into the Endless Abyss together. Grievously injured, Shen Jiu has to think on his feet and forego all preconceptions of morals to survive and protect his sworn sister's son. When they come across a sword with the power to open portals, they believe to have lucked out but things aren't as they seem. They find themselves in a mirror world inhabited by doppelgangers. The only way back is through the sword's magic but the spirit within is obstinate and full of resentment, refusing to lend its power to just anyone and even if it wasn't so, outside forces don't want to make it easy. Fortunately, Shen Jiu has gained allies along the way and they are happy to beat the shit out of anyone who dares to keep a mother apart from her son. Accidentally ruining a plan to topple the Cang Qiong Mountain Sect while dealing with everyday insanity is just a bonus.