Part of Daigotsu's plan was to use the khadi Katsu to communicate with all the assassins simultaneously by modifying a ritual once used by Iuchiban, and passed to the Dark Lord by Daigotsu Yajinden. It had been modified to allow Daigotsu to see and hear that which took place through the eyes of those who were bound by it. Hidden beneath the Ruins of Otosan Uchi, Daigotsu issued the command to "kill them all", which Katsu then passed on to all the assassins. Others claimed the Spider passed the communication with more complicate means, through encoded messages in the performance of plays written by Kakita Hiro, who had been blackmailed to produce such texts.