The detailed method of how gray residual crystals work in "Genshin Impact" is very simple. You can easily solve it by following the editor's few steps.
When you adventure in a new area, you will find this strange crystal that is commonly seen along the road, also known as "grey after-crystal". It is the crystallization of the filthy residue of the abyss, a testament to the catastrophe that has befallen this land.
"Aura" has the power to purify dirt and can affect the remaining gray crystals. When gray crystals block a traveler's path, try to seek help from the aura.
The gray crystals in front of me seem a bit familiar? It turns out that there is a beastly hound sealed in it that has not yet been purified.
Guide the aura to release the monsters sealed by the gray crystals, and you may make special discoveries!