IF my grey wizard character were to pick over channeling as a specialization WHAT does that do for him in a game mechanic way? For that matter what do all the specializations under channeling do,.. how do they benefit the character?
Also, how does a character gain additional specializations after creation? Are these purchased with xp points or are they "given" if the request is reasonable, follows the story, and the GM says "You have been through, and experienced enough overchanneling for the past 4 sessions, you may pick a specialization in that if you would like to."
Thanks for the help!