A complete hero can be purchased directly from the store, by collecting its fragments, or through other offers. To find the actual methods of obtaining, go to the heroes' main menu, choose the required character, and check for the methods of obtaining on his page. The heroes you have in stock are represented by colored icons on the main menu. Heroes who have not yet been received are represented by black and white icons. They also have scales on their icons that display how many fragments have been collected thus far.