Best Wallpaper Ninja

Ninja was a feudal spy in Japan trained in the art of ninjutsu (roughly the "silent movement art") of Japan. Ninja, like samurai, obey their own unique rules, called ninpo. According to some ninjutsu observers, the skill of a ninja is not murder but infiltration. Ninja comes from the Japanese language which reads nin which means to infiltrate. So, the special skill of a ninja is to infiltrate with or without sound.