This Trophy / Achievement is obtained by assassinating 10 enemies in a row without being detected. The best way to do this is to find a camp with plenty of spaces to hide in, such as haystacks and buildings. You can then pick off your targets as you roam through a camp, hiding from the sight of enemies when you need to before picking the next target. You’ll find this process much easier once you have the Advanced Assassination (Way of the Raven) skill, which allows you to assassinate an enemy with a throwing axe immediately after an initial assassination. This means that you can kill two guards quickly to avoid detection, especially if a guard pops out when you don’t expect it.