Chu Nan was not as confident in himself as Supremacy Melanie.
Through the high-frequency vibration of spatial energy, he opened the spatial wall and entered the alternate space from the positive spatial universe. Although he had secretly learned this technique from Supremacy Quediro and had successfully used it previously, he had only learned it for a short period of time, so he was not completely confident.
Moreover, his goal this time was to break through the spatial wall with the huge room that imprisoned Tiago and the others. The difficulty was more than a hundred times higher.
Apart from that, in order to successfully pull out a group of people like Tiago from the spaceship, he was forced to attack it. When he forcefully opened the spatial wall, he had to endure the intense vibration of spatial energy brought about by the explosion of the spaceship, causing the difficulty of this operation to greatly increase.