Chapter 1004 - Crafty little thing
A few Martial Grandmasters frowned and discussed in hushed voices.
If a demon took on mortal form, its true form could be revealed easily with the use of spiritual consciousness as long as the difference between their martial art realms wasn't too great.
For example, if an anaconda took on mortal form, the image that appeared in the martial artist's mind after a check with spirit consciousness would be an anaconda!
The effect was even more obvious with the use of the Demon Revealing Mirror.
After forming a core, demons could take on mortal form and speak in common tongue.
If they advanced further and trained an Essence Spirit, they could even hide their demonic energy and at that point, even martial artists would be hard-pressed to differentiate them!
Because of that, in the ancient era, an emperor created a weapon targeted at demons called the Demon Revealing Mirror. Later on, it became common and widespread in the martial art world.