Since everyone aren't directly using that technique, it won't affect their minds, but the effects of it won't be as good for them as they are for Jayden since Demonic Devouring Arts was just being used to pull more energy towards them and help in absorbing it, which is completely different from Jayden.
And to do all that, Jayden was going to create a tiny rift in all these dragon hearts and then use that technique inside that rift. After they all learn how to use it, they will be able to attract energy a lot faster. It won't skyrocket their growth, but they will no longer be stuck at one point.
Without wasting any time, Jayden began to work on the dragon hearts one by one. In his mind, he had already completed this process thousands of times.
His priority was their safety; it wouldn't be good if they got hurt because of this heart. So Jayden was creating the small rifts in such a manner that it wouldn't affect them negatively.
