I killed every single Tiefling and Druid in the camp before meeting Minthara. I was curious if I could tell Minthara that I had already cleared the camp, but the option did not exist. So, the scene played out like it normally does, and i was given the quest to return to the Tiefling camp and open the gate for the Goblins. This pretty much breaks the game, because you can't call the goblin army with the horn, and you can't return to the Tieflings, because they are dead. There needs to be a way for Minthara to know you killed everyone ahead of time, and continue to progress through the story. In a game that allows you to kill everyone, i think the acknowledgement of that action needs to exist in some form.
