Learning Curve

Question: When a Scion learns the Kriya Boon, do XP discount knacks stop working for ALL abilities, or only those that Kriya affects? For example, would a Scion with Natural Leader and Kriya get the XP discount for Presence and Animal Ken?

Ah, a savvy XP-spender. You're right, that's worded confusingly.

Kriya causes any XP-reducing knacks you might have to cease to apply to any of the abilities that Kriya covers, but does not disqualify you from gaining the benefits of knacks that apply to others. Therefore, Eyes in the Back of Your Head would still provide discounts to Awarness and Empathy (but not to Investigation or Stealth), Fast Learner would still provide discounts to Academics, Occult and Politics (but not to Medicine or Survival), Natural Juggernaut would still provide discounts to Empathy, Fortitude and Integrity (but not to Survival), and Natural Leader would still provide discounts to Animal Ken and Presence (but not to Art or Command). Star Pupil would have no effect at all, since it provides discounts only to abilities that Kriya already covers.

And, since I see them in the list above and feel it in my bones that someone's going to ask, I'll also point out that it is not possible for two XP-reducing knacks from that list above to stack. If you have both Natural Juggernaut and Fast Learner, your Survival is still 1/2 cost, not 1/4. That's not because we hate you, it's just because very few of the knacks overlap and they were never meant to be stacked. (However, other XP-reducing powers, such as Teaching Prodigy or Blood Mead, can reduce it down past 1/2 when stacked with your knack.)