Of course, although Xie Feng did not need to dodge the other side's attacks since it was pointless anyway since he would not be harmed in any way, it did not mean that he could remain in that condition for too long.
In fact, the most he could stand against the Human Emperor Xuan Liuxian with practically all of his main battle skills on cooldown was only sixty measly seconds.
As for five minutes as he had just said... That was simply nonsense. What Xie Feng was doing was talking big to provoke his opponent's arrogance and anger to accept his earlier battle proposal as he could tell how the emperor seemed to start to realize that things did not seem to be as simple as they looked on the surface.