*if you don't know whow to make this hack work the next line or so is for you
Ok go into your maplestory folder Make a new folder and name it Backup, now drag your Mob.wz and Your Charecter.wz into that folder, Now unzip Edited WZ files.rar and put them in your maplestory directory, Play maple you'll notice that you don't take ANY damage and your MP does go down, but after you your mp reaches 0 or a number to low to cast a spell, you'll still be able to cast it.
MEGAUPLOAD LINK:
http://www.megaupload.com/cn/?d=VPCKUAA7