After Shirong closed his eyes, the entire crowd went silent. They knew better than to disturb the person undergoing a heavenly tribulation and knew that if any mishap occurred, they could become the target of the tribulation lightning as well.
Shirong stimulated the spirit Qi in his core and used his Immortal Sky Shaker Art. He had long since reached the absolute limit of the Core condensation realm and only needed a slight push of spirit Qi to trigger the heavenly tribulation.
In fact, had he not been suppressing his breakthrough consciously he would have already broken through naturally due to the spirit Qi being absorbed passively by his body.
~pop~
It was as if a balloon had been popped and the spirit Qi in the air suddenly became agitated. Wind started to pick up and strong gusts started blowing. As minutes passed by, dark clouds started catering high up in the sky.