.The Zantharfyorem (roughly translated Shadow of Death) is an assassin that serves the Void Stalkers. Their history started with a guild that eventually came to fight itself due to two people claiming the leadership. The Grotha Yanthiir of that time decided that neither of the two could gain leadership and that the guild will join the Void Stalker military.
Their name is commonly used to scare children or intimidate people. But acting as if you know them is deadly as they see this as a personal insult, depending on how quickly this lie spreads the person in question can be found dead in several days.