"Light Blade that Slices Despair" is the seventy-third episode of Yu-Gi-Oh! VRAINS anime. It aired in Japan on October 17, 2018.
During his duel against Playmaker, Bohman activates Storm Access and obtains a new Hydradrive. Playmaker has taken heavy damage. Ai then tells Playmaker that he has prepared something in advance just in case. In order to turn things around, Playmaker bets everything on Ai’s "secret weapon" !