Well that's until you get a decent value of speed and athletics!
(And you'll probably find enchanted items in random loot that boost speed, that's free!)
Well when you right click there should be 4 windows that appear.
-The Map
-The Stats
-The Inventory
-The Spells
You just click on the spell you want to equip in the list.
You can move the windows around, in case the window was hiding under another one.
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http://img.imgcake.com/cosplaygifer.gif
http://en.wikipedia.org/wiki/TORtanic