Duhnmair gravely accepts the blade, and then hands it to one of his knights. He bows deeply.
"We thank you," he says. "You've performed a great service for us, both in returning this blade but also in the information you bring. Please sit a moment. Amergin, break out the wine."
A few moments later, the wine is distributed to all who want it, and the fey knights and adventurers sit to listen to Duhnmair.
"The shapechanger you describe was a bricriu, a strife bringer. They belong to the Unseelie, who've not been seen in these parts for many years. The Unseelie are fey, but they serve dark powers."
Duhnmair takes a sip from his wine.
"Borderland Keep is likely infiltrated for bricrius work in groups. Where there are two, there are almost certainly more."