Kerra trace their ancestry back to their first great leader, Kejaan. He travelled the continent of Odus, uniting the various tribes into one kingdom and ushering in an era of peace and prosperity. One day, Erud and his High Men arrived to settle the continent. This splinter group of humans took over much kerra land; even worse, a great plague infected many and caused massive deaths. The Kerra blamed the Heretics and their study of necromancy. Kejaan succumbed to the plague, leaving his son Vah Kerrath as leader. He vowed to make the Heretics pay.
During the civil war between the Erudites and the Heretics, a huge explosion of mystical forces teleported an entire kerra village to the dark side of the moon of Luclin. Vah Kerrath survived this journey and renamed his lost tribe the Vah Shir. The Kerra on Norrath scattered; some went west to settle Kerra Isle, others east to a tiny island in Erud's Crossing, and others fled deep into the Stonebrunt Mountains. Much later, a path to Luclin was breached and some of the Vah Shir returned to Kerra Isle, breeding a new, stronger people.