Chipped Talon

[Ukase]

So, while running Sir Bedwyr's arc, part 4, (doing them out of order) I notice that the npcs are Talons of Vengeance. Beat 100, get a badge. But, when I took out a banshee - no progress on the bar. Curious if that's by design? Doesn't make sense to me. The others give progress, so it won't hold me back - but why wouldn't the Banshees give progress? They are part of Talons of Vengeance.