Dark Assassination

After killing Qi Zai, Fang Yuan pulls flying sword Immortal Gu from the opponent’s forehead. The Gu is dim and emits no aura because of this move. It provides extraordinary concealment: once used, none of the aura of the rank seven immortal killer move leaks, and others cannot detect it. The sword attacks at a speed one cannot react to. The only weakness is a small attack range. The user has to be less than a hundred steps away, far shorter than ordinary immortal killer moves. Fang Yuan had to use familiar face, take injuries on purpose, and get close through Qi He in order to land the strike. ^{ch. 1043}

Flying sword Immortal Gu is the core and has to be used together with dark limit Immortal Gu. After some time, combined with other supplementary mortal Gu, the move can be unleashed. While he must keep attacking Tang Song, he cannot use it, because he has to maintain pressure and keep flying sword Immortal Gu in continuous use. ^{ch. 1046}

In Hei Fan grotto-heaven, Fang Yuan hands Chen Chi a sword path Immortal Gu, then activates this sword path killer move. A bloody mark on Chen Chi’s forehead enlarges, blood spews from the front and back of his head, and Chen Chi dies before he can react. ^{ch. 1123} Only immortal methods like this can completely conceal the aura of Immortal Gu without leaking a trace, so the caster can sneak attack and catch an enemy unprepared. Disguised as Chen Chi, Fang Yuan activates it again and kills Chen Wan Yun the same way. ^{ch. 1124} Disguised as Chen Le, he uses it on Zheng Tuo. A mortal killer move cannot stop an immortal killer move with rank seven Immortal Gu Flying Sword as the core, and Zheng Tuo is cut in half on the spot. ^{ch. 1125}