Qi luck sensation.
This immortal killer move came from Hei Fan grotto-heaven, the inheritance of Gu Immortal Feng Jun.
It used qi luck Immortal Gu as the core, with supplementary mortal Gu, to allow a Gu Immortal to sense people who were closely related to them in terms of luck.
Furthermore, the closer they were to each other, the clearer the connection would feel.
Fang Yuan used this move to sense the locations of Ying Wu Xie and the rest, even though they were separated by regional walls.
This was because Ying Wu Xie and the rest had their luck connected to Fang Yuan.
After using Connect Luck, both parties would have their luck closely connected, they would share both fortune and disaster together.
However, with Ying Wu Xie's methods, he was able to negate a portion of the effect of qi luck sensation, he even could hide inside an immortal aperture to cut himself off from Fang Yuan's detection.