Zhou Tian's strength allowed him to directly shatter the nearby space barrier without any difficulty, but due to the restrictions of the ancient beings, he evidently couldn't do such a thing. Thus, after hesitating for a moment, he had no choice but to make other arrangements at that time.
If he couldn't do it himself, he might as well let the weapon in his hand do the job.
Aside from not having rule-based powers, the explosion power of the crystal bombs was by no means weaker than Zhou Tian's attack power. Under these circumstances, Zhou Tian, after taking out his crystal bombs, clearly did not intend to merely intimidate those ancient powerful beings; based on the situation at that time, he truly planned to detonate those crystal bombs.
