Trolls are the most elusive and secretive of all monsters. Very little is known about them as there have been no visual sightings in centuries. Rumor has it that they are the underlings of monster clans, disposing of uneaten bodies. Some reports indicate that they can also haunt your dreams if you ever encounter one.
These monsters are evolved from the Werewolf Genus. They are not the same, however, and one should never shoot a beast man with a silver bullet, as this will only enrage them to the point of ripping your head off. They are extremely loyal to their vampire masters and have the strength of ten men.
It's safe to say that if you happen to run into a modern vampire, the best thing to do is keep your distance and hope they don't notice you. Modern vampires are familial and operate by clans, with each clan having various strengths and weaknesses. That being said, if you decide to take on a modern vampire, know what clan you are dealing with. I would not advise taking any action, contact your local professional monster hunter immediately! These monsters have been known to wipe out entire neighborhoods.
Professor Peterson Von Broscius'
Professional Monster Hunter Handbook