The Gray World: A Sword Rises in the Azure Heavens, Shining on the Mortal Realm

Jin Yong's Wuxia Novels

Zhang Sanfeng is the leader of the martial arts world, and a group of people go through what seems like a series of trials on Hero Island. I think there was also a Pear Blossom Storm Needles weapon. In the end, immortals appear from the clouds above the island. I've been searching for ages but can't find it.