AO Crystal in "The Song of Strange Sage: The Song of Aida" is a very useful material in the game, and if you want to dig more AO crystal, you can dig at the rain. Crystal only appears when it rains, and you must pay attention to this.
How to dig more AO Crystal
In "Strange and Sage Partner: The Song of Aida", your main source of income is AO crystal. These huge red crystals are used by humans as energy. As a free wandering, digging these crystals is your livelihood. To dig a larger and higher purity AO crystal, you need to better dig tools, but there is also a method that can bypass this requirement to a certain extent.
That's rain. Although rainwater may destroy most humans and damage your mech, it can also make AO crystals stronger. You can judge whether they are activated through several signs: when it rains, a red beam will shoot into the sky, and the glory of the crystal will be slightly brighter than usual. The excavation of AO crystals on rainy days will increase the scarcity of the crystal and increase it to a level. This makes each AO crystal more valuable.
There is also an interesting detail -when digging, the circle color around the crystal represents the average scarcity of the crystal.
