The Demon Beneath My Wings (S05E05)

After Uncle captures the chi of Hsi Wu, the sky demon, he tries to store it in the chi containment unit, but it's damaged, forcing the chi to stay in the chi-o-matic instead. Mistaking it for empty, Jade takes the device on a school field trip to a haunted doorknob museum. Unfortunately, her teacher, Mrs. Hartman, seizes the chi-o-matic and inadvertently absorbs Hsi Wu's chi. The situation escalates in the haunted house when Drago shows up, causing the resident ghosts to become furious at the presence of two demons.