Luminous Sands from Guyun is Weapon Ascension Materials used to ascend weapons, increasing the stats and max level. Higher-rarity materials can also be crafted with Alchemy by combining lower-rarity materials from the same group.
The stone pillars that tower amid the Guyun Stone Forest were once the stone lances Morax used to defeat his enemies. As time passed, the body of these gods penetrated into the pillars, granting them divinity. The pillars would sometimes shed crumbs of hatred and curses.
How To Get
Luminous Sands from Guyun is obtainable as a random reward from completing the Hidden Palace of Lianshan Formula domain near Mingyun Village every Monday, Thursday, and Sunday. It can also be purchase from the souvenir shop in Liyue with Geo sigils.