After utilizing the Berserk ability Greg inherited from the Lesser Minotaur, his physique grew stronger than Jason's by a large margin, and only by using multiple affinities was Jason able to fight Greg head-on.
However, due to Greg's low proficiency with his Berserk ability, Jason was at an advantage. This gave him time to notice that Greg was forced to stay motionless within the mist in order to release his mana.
Thanks to that he figured out that Greg's control over his ability was still unstable, even if it was much better compared to before.
Appearing in front of Greg with his body leaned forward, Jason stared at his friend with a serious expression, who returned his gaze.
Jason released all of the dozen, fist-sized black fireballs at once in order to attack Greg's vital spots leaving his head.