16 hours ago, SavageBob said:

I like the idea, but I kind of think it's inelegant to not just have the player spend XP directly on it. It's another number to track, which bogs things down. But I suppose it wouldn't be too difficulty to treat them like Signature Abilities or something and let PCs upgrade them directly, maybe after they get a couple of Tier-3 talents or something.

I agree it does lack in elegance. But it isn't really another number to keep track of, assuming you are already keeping track of your total XP.

I guess it also opens up another mechanic for setting designers to play with: XP triggered abilities. This could be used to model various concepts. Every 25 XP, you learn a new spell, or gain a new contact, or whatever.