I was unable to find a clear answer from the rules/FAQ on the timing of vigilant. Does vigilant occur after all responses to the challenge are over, or before, or during?
Here's the illustration:
I have Blackwater Bay location (Response: After you win a POW challenge, kneel Blackwater Bay to choose a card with the SHAD crest in your discard pile, and place that card in Shadows.) with the attachment King's Ground (House Baratheon only. Attach to a location you control. Attached location gains Vigilant.) on it.
I win a POW challenge. Can I use Blackwater Bay twice?