As powerful as magic is, it does have drawbacks. The most common way magic is used is to be wielded as a weapon. Due to the nature of magic, the effects of magical spells may not be apparent. Some creatures themselves are born of magic, with powers to ward off magical attacks. Others have other ways to defeat offensive magic cast upon them. In order to efficiently use magic to defeat a foe, means being able to tell if your attacks are having any affect. By carefully studying the effects of magic one can deduce his effectiveness against his enemy. Of course there is said to be magic which can hide the true effects of magic from even those most proficient at this skill. It is said that wisdom may help discern the effects of spells using this power.