The Three Determinations of the Universe is actually a Fist Skill.
This Fist Skill requires a high level of control over Primordial Power for Martial Artists. In his previous life, Duan Gujin spent a full three years to master it.
Previously, he had not considered displaying this Fist Skill because the timing wasn't right.
Undoubtedly, the Fist Skill can only bring out its full might in close-range combat with the enemy.
Previously, Duan Gujin was worried about suffering serious damage from the Divine Soul Attacks of his enemies before he could even get into close combat with them.
Thus, during the earlier battles, he hadn't thought of using the Fist Skill, Three Determinations of the Universe, on his enemy.
But now, his enemy was that clone, which had already been seriously injured. Its movement speed, compared to its peak, had significantly decreased.
Duan Gujin judged that if he engaged in close combat with the clone now, he would have a certain chance to defeat it.
