Jacob Frankenstein

Jacob Styne is a member of Styne Family, a family which has consisted consisted of magic practitioners for several generations. He led a group of mercenaries which searching the Book of the Damned.

Background
Not much known about him. Jacob and his mercenary have been searching for the Book of the Damned across several countries in Europe. Eventually, he later tracked its presence in America.

Season 10
After learning if Charlie has been obtained the Book of the Damned from a library in Tuscany, he later pursued her and successfully wounded her during her encounter in alley. He later pursued her and committed numerous killing across his way to capture Charlie and reclaim the book from her. Eventually, he captured Dean in a minimarket. He later told if a spell from the book capable to remove the Mark of Cain. Dean later managed to escape from the scene after a fight and killed one of his henchmen. He later came to Charlie's safe house with his henchmen. In a gun fight, he later mortally wounded by Dean and later killed by Sam with a fatal stab with a metal knife in his stomach. In his last breath, he swear that his family will never stop looking for that book.