"What are you-" the woman beside John yelled out frantically, but her words were too late.
The mysterious person holding the dagger arrived behind John like a ghost, the dagger piercing forward with lethal intent.
John spun around instantly, a wave of anger rushing through him. He roared with power as his right hand punched sideways, slamming into the outstretched arm of the mysterious assassin before the dagger could reach him. A sickening crunch sounded out as his punch broke the assassin's arm, blood flying outwards as bone broke through skin.
A cry of pain filled the chamber, which shook violently a moment later as John rushed forward, grasped the assassin by the neck, and slammed him into the wall of the chamber. The chamber wall cracked, and a pained gasp escaped the assassin's mouths as John's hand nearly crushed his neck.
Had he not held back, it would have no doubt done so.