Thanks for the clarification. I think it still isn't clear when this MAY be done. The new text says " commonly performed as the final act in becoming a Warden" but CAN it be done later?
Also, while I like the fluff, it's gonna be kinda burdensome to write that EVERY TIME. May be too late to be screwing with content if things are going into layout, but my personal recommendation would be to do something like:
[Somewhere in the chapter talking about higher-Circles but before the actual per-Discipline breakdowns]
Advancement Ritual (or whatever you want to label it)
Once achieving Warden, each Adept is instructed in the rites of a one-time Blood Ritual that further refines the Discipline within their Pattern. While there are common elements to the ritual for all Adepts of a shared Discipline, the actual ritual is unique to each individual, drawing up personal experiences, philosophies, and ideals. Some may summon spirits, trading a piece of their Pattern, while others commune with the ghosts of Discipline Masters that have passed into the Nether before them, earning their approval and boon. Regardless of the ritual specifics, it requires eight hours of dedicated time. At the conclusion of the ritual, the Adept takes one permanent point of Blood Damage and receives the Discipline-specific bonus. This Blood Damage is permanent, it cannot be healed, and the Discipline-specific bonus is permanent. An Adept can only perform this ritual once, and while the ritual can be performed at any time once Warden status of the Discipline is achieved, it is commonly performed as the final act in becoming a Warden.
Then, for each actual Discipline, we end up with something like (for Troubadour):
Unnatural Charm: (Advancement Ritual) The Adept gains +3 to their Charisma value.