Xu Tui knew that he had arrived at the small universe of the Heavenly Court the moment he came out of the cosmic tunnel that was opened by the two emperor's seals on the Immortal Slaying Platform.
He was too familiar with the aura of the small universe of the Heavenly Court. Moreover, he felt too safe compared to when he was in the Samsara Small Universe. If the Samsara Small Universe was the home ground of the Venerable and Emperor Yin, then the Heavenly Court Small Universe was Xu Tui's semi-home ground.
Not to mention anything else, the two emperor's seals and the Heaven Overseeing Eye were all great help to Xu Tui. Moreover, there were more than a million troops that could be mobilized here. Therefore, Xu Tui did not close the cosmic tunnel that quickly.