Chapter 388 is out. Now is the 4th rumble mentioned by Kurapika. It happened that I only managed to see / read about the 2nd and 4th. I don't found about 1st and 3rd. Spoiler: 2nd Rumble Chapter 382, Page 17 Spoiler: 4th Rumble Chapter 388, page20 It happens that only Nen user can spot the rumble. Is it due to massive nen-users awakening or nen-abilities? From where and whom is the source? I remember it once during Killua's sister healing Gon; it's a nen-remover ability type.