One Crusader assassin was lurking in the shadows, however they got a facelift and a new leader. The Emperor was long since desposed, but none of the Crusaders wanted to admit it. Now under the command of one his formal generals,
Horus. The Crusaders no longer hunt dragons, but now keep a close tab on anyone that's a possible threat.
This assassin has gone under heavy cybernetic upgrades, his face was replaced with a flashlight like 'eye' how he can be stealthy with that, no one knows.
But now this assassin shares his brain with over 1,000 computer programs, making him capable of reaching a consensus quicker then any organic.