What is mana? How do I use it? When I equipped "mages dagger" that has mana I get a button at the bottom left of my screen that lights up with the spell symbol, when I click on it I see a counter that takes up my dialogue box, the counter shows zero. What do I with this how do i use it? I also have a staff that increases my "TH" by 25, what is "TH"? It`s the staff of Xeneroth or something.