The Operation Capture Baba Yaga Castle Arc is the sixteenth story arc in the manga Soul Eater. In this arc, a small force compared of DWMA students and Medusa's army infiltrate Baba Yaga Castle, the main base of operations for the powerful organization Arachnophobia, in order to assassinate Arachne Gorgon and rescue Kim Diehl, Jacqueline O'Lantern Dupré, and Crona. While this arc has similarities to the anime-only arc Arachnophobia vs DWMA, this arc is exclusive to the manga.