Stein’s research leads him to the theory that a certain heretic’s soul is inside the old golem. In the process, he finds a report about an incident in the Czech Republic where half a million people saw mysterious illusions that looked like spiders, and this causes him to conclude that the heretic scattered her body 800 years ago and left her soul in the golem. This heretic was the witch Arachne, and realizing makes Stein want to go help Maka and the others, but Shinigami-sama urges patience. Arachne is the mother of magic weapons, but creating one required the sacrifice of a witch’s soul. 800 years ago, she had been pursued by Shinigami-sama and had escaped into the old golem’s chamber. Back in the present, Maka and Crona are having a hard time dealing with Giriko and the golem, and Maka finds herself unable to move her body after getting sprayed with a special silk. Spiders then appear all around them and combine to form Arachne’s body. (thetvdb.com)