when did zoro get enma

Roronoa Zoro got the legendary sword Enma in One Piece Episode 954 (anime) and Chapter 953 (manga). He received it from Kozuki Hiyori during the Wano Country Arc in exchange for leaving his current sword, Shusui, as a national treasure in Wano. Enma is one of the 21 Great Grade swords and famously was wielded by Kozuki Oden, the only man known to have scarred Kaido. This sword significantly increases Zoro's strength but challenges him because it drains his Haki. Zoro's acquisition of Enma marks a major turning point and enhances his capabilities as a swordsman for the battles ahead in Wano.