Picked up a Nine-Tailed White Fox at the Beginning

(No harem, not brainless) Eighteen years ago, the fairy sword fell on the border between humans and monsters, and turned into a giant sword peak to resist the monsters. Gu Xiaojiu was born at the moment the sword fell... Affected by the sword energy, he was born with heartache and suffered for eighteen years. At the age of eighteen, he got the sword seal, saved the fox demon, got married, got a glimpse of the path of immortality, and asked for immortality. As the saying goes, being obedient will lead to mortals and those who go against will become immortals. Over the course of hundreds of millions of years, those who have achieved enlightenment and become immortals have tried their best to deceive the way of heaven. However, Gu Xiaojiu has no way to avoid it and can only go against heaven.