Adam, Angela and Wayde used their Disguise Illusion Stones as they headed over to the arena with Cole and William. Although Advanced Cultivators could see how they really looked, if they were an Advanced Cultivator they would be able to sense the powerful aura around them anyway.
Most of the cultivators heading towards the arena were also using the Disguise Illusion Stone just so that they didn't cause a commotion in the public, which was something that most cultivators agreed was taboo.
"Cole, calm down, take deep breaths, be confident and remember you aren't only doing this for your parents and because it is your destiny. That is bullshit. Do it because you want to and because you want to be able to live a happy life where you don't have to worry about anything and can get rid of anything that is threatening your happiness and the happiness of those that you cared about" advised Adam as he placed his hand on Cole's shoulder and gave him a reassuring smile.