User blog comment:Goddess of Despair/RWBY user battle tournament/@comment-6757965-20130226104010/@comment-5726563-20130226232202

For instance, rather than unbreakable, you could have it be armor that will regenerate slowly, such as one inch of broken armor taking 10 secs to fully regenerate with the more damage he has the slower the regen, so he still has a weakness but he also has magic armor. Also, possibly give it a weak point where he is extremely vulnerable. It gives him a weakness but also a reason for honing his speed and agility, so that he could kill people fast before they had a chance to get his weak spot and so that it didn't become a drawn out fight where his armor could start to get damaged.