Only spoiled a few hours and already a question has arisen as to its text:
Response: After you win an unopposed challenge, kneel Freed Galley to claim 1 power for any participating unique [Greyjoy] character.
Okay, so what does "any" mean here? All participating uniques or just one? And does the power go on the character(s) or House card?
I lean to just one -- it would only have taken one more letter to say "each." I also read it as claiming power for one's House since it doesn't say that the character claims the power. But both are ambiguous enough that a ruling would be helpful.