If I go to Guild #3, can I get them all at once?
Nope. Sorry, but you must chase down the exact one you want for the level of power you are after. For instance, to get the power Shadows 2, you can’t go to TG1 or TG3. You can only get it from TG2. It is a bit of a work out, but it makes the goals of the game more interesting, I think.