Slayer mating season only happens every 200 years, people who use heavenly body magic are infected as well considering there magic power levels are as strong as slayer magic The ships are Nalu Gruvia Gale Miraxus Rogura Jerza StingYu RoWen And some Zervis (he isn't effected but u have to read to find out why zeref is in this book ;) ) SO PLEASE READ AND ENJOYYYYY :)