» Thu Jun 14, 2012 10:11 am
Sarakyel is right, there are more than 12 charms in the game, but we expect most players to find something like a dozen in a playthrough, they are hidden.
Also, calmlikeabomb is right, think of it as small little passive perks in most cases, not big effects like shadow kill or agility. The preorder DLCs give a good idea of what the effects can be, not game affecting, but interesting little bonuses.
To answer Calrabjohns, yes, you will know what the charms are on picking them up, they are named and have a description, again, just as the preorder ones.
Note that you can choose which one you activate into your active slots at any time, so you can change your "deck" of charms depending on the situations.