The Vicious Blackbeard
On the opposite hand, Blackbeard wasn’t a myth at all. He was real and really threatening. His real name was Edward Teach and he was traveling the Atlantic Ocean terrorizing everyone that would come his way. According to some researchers, his trademark was to “weave hemp into his beard and light it on fire—an intimidation tactic that made him look demonic.” He was definitely an inspiration for the popular pirate movies.
What about treasures?