When the weapons (Dream of Mirror Gold) grow and upgrade, a few holes for mounting mysterious stones will appear on them. When the players mount the randomly acquired mysterious stones during combat on their weapons, the power of weapons can be greatly improved or the weapons will have more features.
The design of mysterious stones is based on the traditional Chinese four essentials and eight virtues. Currently there are 12 mysterious stones? Loyalty, duty to parents, kindheartedness, love, credibility, personal loyalty, harmony, peace, proper etiquette, personal loyalty, a sense of honor, and a sense of shame. Each stone has different capabilities.
When you upgrading your weapons, if you use a weapon it gains XP. When you it gathers enough you can upgrade it with alchemy, using same materials as for crafting other things. The weapon gets stronger and gets a random bonus up to +15 and requires level (Dream of Mirror Online Gold) 5 more, so a weapon that requires level 10 will require level 15 after first upgrade. The level 10 weapons can get only to weapon level 3.