When enchanted, P. Def. for armor/accessories (D-grade) +1. When enchanted to +4 or above, P. Def. increases by 3. Can be safely enchanted up to +3, and one-piece armor can be safely enchanted up to +4. HP gradually increases with each enchant level starting from +4. If enchanting fails, the item will not be crystallized but the enchant value will be reset to 0.