Let's rewind time a little.
As mentioned before,
inside the Sword Tomb, there are three renowned Sword Ponds known throughout the world:
Ascending Tower, Xuanzhong, and Hundred Refinements.
After stepping into the Life Palace Realm, disciples of the Sword Tomb may choose to enter a Sword Pond and search for the sword best suited to them.
Similarly, a cultivator who has passed all nine challenges also gains this privilege.
This is why many people come to the Sword Tomb to take on the nine challenges.
In reality, after the Sword Tomb went into seclusion in East Desolate, very few cultivators have come to take on the nine challenges.
That is because hardly anyone can find the location of the Sword Tomb anymore.
But those ancient inheritances still know more or less the whereabouts of the Sword Tomb.
As a neighbor to the Northern Land of East Desolate, coming from the Beiming Sea Domain, is the Ziwei Sacred Land.