When I did the mission to close the big gate I was over level 30 and the deadra kept killing the Imperial army and Martin so fast it was crazy. The battle would start, I would kill nearly all the deadra by myself to have 1 get past and kill half the Imperials then Martin. There was nothing I could do to stop them, to many deadra, and at that level it would only take a hit or two for them to kill Martin. Then I remembered the staff that could freeze time. Nope I didn't freeze the deadra.....
I froze the Imperial army and took on ALL the deadra by myself. It was epic

. Since I went into the gate while they were frozen they stayed that way till I came out. All the Imperials remember happening was the first gate opening, and then me stepping out of the big gate with the sigil stone into a field of dead deadra. Yup I felt like the god of madness more right then than I ever did in the Shimmering Isle. Did the same thing in the final battle to keep Martin alive, also good because I took a pit stop to Kill Mehrunes Dagon.