Marshall D. Teach, also known as Blackbeard, is part of a special bloodline in the One Piece universe. This lineage is known only to a select few, including his own crew and the Five Elders. This bloodline is significant because it hints at a famous lineage and is potentially linked to his unique ability to wield the powers of two Devil Fruits, a feat unheard of in the One Piece world. His bloodline and abilities have led him to become one of the Four Emperors ruling over the New World and the captain-turned-admiral of the Blackbeard Pirates.