When enchanted, increases P. Def. by 1 for S-grade armor and accessories. After +4, they increase by 3. Can safely enchant up to +3, and for one-piece armor, can safely enchant up to +4. If the enchantment fails, the item is not enhanced, and the existing enchant value becomes 0. When armor is enchanted above +4, HP also increases according to the enchant value.