Once upon a time, being invisible was a dream for many. Unfortunately, no one knew how to cast magic and couldn't use this feature. Only the ninjas were close enough to master the art of hiding to approaching their targets undetectably, but it was not associated with magic back then. As the world changed and magic became more entrenched, invisibility spells were discovered. Although it was a huge and delightful discovery, nobody thought it would cause more problems than advantages. One of them was the inability to detect invisible creatures or things. This resulted in the inability to find hidden belongings and sometimes even to find friends who were unable to return to a visible form. Moreover, this skill has also been used by villains, who have found it easier to do harm while invisible. That's why the Detect Invisible skill became one of the most potent thief skills. Nowadays, thieves and ninjas use this skill to gain the upper hand in combat. Having this ability, they can see all the hidden abilities of the enemy without triggering any harmful effects. The power of this skill lies in its ability to bypass all forms of invisibility, including magical and physical means. It makes this skill one of the most valuable skills among them all.