Board Thread:Dark Souls II/@comment-25071275-20150426020545/@comment-26331079-20150429145526

I don't think it actually degrades faster, just when fighting the boss, you're using it constantly and it's taking a whole lot of time finishing them off. That, if you probably use spells like Crystal Weapon and I believe Sunlight Blade, you're making your weapon strong, just less durable.

You gotta hit them where it hurts!! Go for the legs!