User blog comment:Master Sima Yi/Contradicting and confusing terms in the Encyclopedia/@comment-90.215.74.146-20111130175429/@comment-1153722-20111130181925

Assassin leaders are Master Assassins, but they are just tasked with leading their Brothers. Though within a branch, there are multiple Master Assassins. Like Yusuf Tazim and Piri Reis; both are Master Assassins, and Yusuf is also the Assassin leader.

Master Asassins don't necessarily have a set task in every branch. For example, some of them defend Dens in Constantinople, but that doesn't have to be the same everywhere. Nothing's known about that specific subject.