Upgrade Rules
3 identical low-level patterns with fuse cost (Dragon Glass) can be fused to one high-level pattern.
After upgrading, the pattern's basic attributes are randomly reassigned, while unique passive and class-specific attributes are retained.
If the materials for the upgrade include patterns with rare attributes, players must manually choose one to preserve for the next level.
Durability: Higher-level patterns have higher durability, and no scientific techniques have been found to repair the durability.
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