Fairy Tail 240 see’s the destruction of Fairy Tail HQ when Sayla activates her bomb lacrima, all while Jellal fights against the members of Oracion Seis to gets them to join his quest in fighting against a common enemy, Zeref! Crawford transfers the key from Jellal to himself when Kyouka stabs and kills him leading to Face activation.
Fairy Tail 238 discovers that Crawford Theme (or Seam), the former council leader was the one feeding the information back to Tartarus in order to once again become the head of the council. In turn he drugs Erza and Mirajane to bring them back to Tartarus HQ, whilst Natsu figures out that he’s the leak. Erza and Mirajane are put under tests and tortured.