Assassin

"The Assassin kills. Trained in stealth, he delivers lethal blows in the form of a thrown weapon, a poisoned blade, or a knife between the ribs."

Assassin's are the reason it's not safe to leave one's back open for long. Specializing in quick and stealthy kills, the Assassin class is perfect for anyone wanting to ambush their enemies and leave them dead on the ground before they can have a second thought beyond "Who's that?". Not as trap-oriented as the Rogue or good at espionage as the Spy, but if you need someone dead in a more subtle way than the Brute or Duelist, the Assassin is the right choice.