Postby Lys » Tue May 20, 2014 6:27 am
You actually seem to have the right of it for the most part. To clarify, if a Talent is "Karma: No", and it's a Discipline Talent, then you can spend one karma to roll an extra d6. If a Talent is "Karma: Yes", then you have to spend one karma to activate it, but you do get to add an extra d6 to the roll provided there is a roll. You don't need to spend any extra karma for the d6, and in fact you're normally not allowed to spend more than one karma. Additionally, if a Talent is Karma: Yes, and a Discipline Talent, you can elect not to spend karma.
To put this in more concrete terms, take the basic Melee Weapons Talent, which has no strain cost and is Karma: No. If it's a Discipline Talent then you can spend 1 Karma Point to roll an extra d6 when you use it. If it's not a Discipline Talent, then you can't spend karma on it at all. Now take the Second Attack Talent, which is Karma: Yes. When a Warrior uses Second Attack, she can choose whether to spend the Karma Point or not, because it's a Discipline Talent for Warrior. If she does spend the Karma Point, then the Warrior gets to roll an extra d6 on her Second Attack Test. Now suppose that a human of some other Discipline, a Thief perhaps, learns Second Attack using Versatility. That means the talent isn't a Discipline Talent for him, so the Thief has to spend Karma every time he uses it, but he still gets that extra d6 on his Second Attack Test from spending that Karma.