Shanks got his famous three-line scar over his left eye from Marshall D. Teach, better known as Blackbeard. This happened before Blackbeard acquired his Devil Fruit powers and before Shanks formed his own crew, likely when Shanks was still an apprentice on Gol D. Roger's ship. The scar was inflicted during a direct confrontation, not a surprise attack, indicating that Blackbeard was already a formidable opponent even without his Devil Fruit abilities
. The exact timing is estimated to be between 27 and 22 years before the current timeline in the series, after Roger's crew disbanded but before Shanks became a prominent pirate captain. Shanks himself mentioned the scar to Whitebeard before the Summit War, highlighting Blackbeard's dangerous potential
. Blackbeard used claw-like weapons to inflict the scar, which matches the appearance of Shanks' facial wound. This encounter symbolizes the first time Shanks truly recognized Blackbeard as a serious threat, and the scar has become a trademark feature of Shanks' character
