After the death of those experts, there was a different kind of glow which was on Devon's left eye.
If the donkey or Zaylee was here, they would have urged Devon to stop using the power, but when it was the red sword who was with him, there wasn't going to be anyone warning Devon.
Unlike the others who knew the harm the devil bloodline would cause to Devon if he were to awaken it without being able to control it, the red sword was very much unconcerned about the damage it would cause.
Truthfully, this was expected of the red sword, as Devon's lineage weapon, it wanted its master to awaken that power very fast, as once it awakens, Devon only needed to lift one step, and he would ascend to the primordial world.
And the harm that the others were worried about would be very insignificant.