Genshin Impact 3.6 update has brought a ton of new quests into the game, and one of them is the Khvarena of Good and Evil world quest and one of its subquests called The Splendorous Sky That Day that will ask you to "Use the power of Khvarena to destroy Gray Crystals." Gray Crystals are left behind by the remnants of corruption, and here is how you can destroy them using the power of Khvarena.
Genshin Impact: Use Power of Khvarena to Destroy the Gray Crystals
You will first find Gray Crystals at the location marked on the map above in Gavireh Lajavard, where they will be blocking your path, and you will have to destroy them to reveal a passage.
In order to destroy it, you will have to find a green-colored floating orb that will be hidden behind the rocks. Break the rocks and collect the orb that will start floating around you.
Once done, go near the Gray Crystals, and the floating orb will destroy the Gray Crystals automatically, revealing a new path.
However, you need to keep in mind that these Gray Crystals will restore again after some time, and you will have to destroy them again by using the method above. That is everything you needed to know about using the Power of Khvarena to destroy Gray Crystals in Genshin Impact.