Phoenix bloodline lore question: King of the Mountain (spoilers)

[ThatGuyDM]

Interested in making a sorcerer PC with this bloodline, and in an effort to integrate it into the campaign, is there any lore reason why it's unlocked once players complete the Ruby Phoenix AP? I haven't and can't read it, so I'm fine with spoilers. Did victory in the tournament awaken a dormant power or something similar, or is it more of a meta thing?

[keftiu]

Presumably because of the titular Ruby Phoenix.

I can’t imagine any table forcing you to abide by that restriction.

[Losonti]

It's worth noting that completing the AP (or, at least, volume 3) does give you a boon that unlocks the bloodline for all of your PFS characters.