After walking for a while Zhang Yi finally used his mental energy to know how big this tower was, luckily different from the outside he could see the whole tower, but he could only know that the tower was 10 stories high and he was in first.
So Zhang Yi understood that he would just have to keep walking straight that after a few hours he could reach the tenth floor where the demon should be sealed, it seemed easy and Zhang Yi didn't know if there was any trick in that tower.
Zhang Yi could also feel that inside the tower had an incredible influence of the laws of space and time, the laws of time did not disturb who entered the tower and seemed to affect only the demon, the purpose of the laws of time seemed to be to slow the passage of time inside the tower just as Zhang Yi did to cultivate.