It's a ninja. Professional soldier. Specializing in espionage and assassination. About 400 years ago.
9 seconds sound clip from the Revenge of the Ninja movie soundboard.
You can hear this line at 00:18:08.528 in the Blu-ray version of the movie.
Quote context
[...]
- I knew there was a reason I made you my partner. You couldn't have made a better selection.
- Nothing would have been possible without your help.
- Oh, no, no... Money's easy to find, but good men, that's another story. This is going to work out.
- Worst bastards the world's ever known, right?
- It's a common misunderstanding that the ninja were all evil. But not accurate.
- That was their special skill. The thousand ways of death.
- Like I said, this gallery's gonna be the best thing that's happened to this town since I got here.
[...]