The Irregular at Magic High School Season 3 Episode 8

The women’s division of the Steeplechase Cross-country Event has finally begun. Tatsuya has Pixie figure out the location of all the parasite dolls and tries to eliminate them before they come into contact with the players. However, the parasite dolls unleash their magic at speeds that exceed Tatsuya’s imagination. Though it is difficult, he manages to seal away the first parasite doll. Tatsuya goes on to seal away the remaining parasite dolls one after another, but the highest-performance models, the Prime Four, now stand in his way.