Korosh unties the ropes binding the Kobold while standing in front of it and blocking its only way to freedom. He raises his gloved hand to whipe away one of the kobold's tears off its scaly sheek. "I have decided to spare you. I believe you told me the truth and will not dirty my blade with your blood. You will live, but I give you a choice of how you will live.
I can release you, give you complete and utter freedom such as you have never before experienced. You will have the freedom of solitude, you will be alone and helpless but noone will tell you what to do. That would be a sentence of death. If you are not simply killed at sight by the first random hunanoid or beast that wanders by you will die a long slow death of cold and starvation. That is one option.
Or you can choose to stay with me, be my servant and ally. I will treat you better than your dead chief, I will feed you, keep you warm and in greater safety that you would have alone. You will obey me and I will be a good master, disobey and you will be punished. That life will be longer and more comfortable, but you will not be free. This is your other option."