Gou Deduces How to Become an Immortal in the Troubled Times of Evil Spirits

Yi Xun unexpectedly gained the ability to deduce, but he glimpsed the terrifying future one year later—— His head was cut off by his junior sister, and the entire sect became a sacrifice to evil spirits! Fortunately, not only can he gain insight into many causes and effects through deduction, but he can also gain astonishing gains from them, gain insights into the secrets of annihilation, and even change the ending of certain death! Yi Xun originally thought that he would be able to fight against that evil spirit before he came out of the mountain, but he didn't expect that the danger around him was extremely dangerous, and His gaze was everywhere! The sect that was supposed to lend a helping hand stood aside and watched. As he got closer and closer to the truth of the matter, he discovered that it was not as simple as he imagined... Plans have changed, prepare to become an immortal!