Coming to their village, the wizard Raevil took three women as his apprentices: Bera, Groa and an unnamed woman. Raevil taught them his art. The more they knew, the more they wanted. It corrupted Groa and the others, turning them against each other. Bera and Groa stayed rivals for a very long time, until Groa was killed by Rikard.
After her death, Bera and Groa were revived by Kadlin to serve as her assistents. Kadlin was later revealed to be the daughter of the unnamed woman, who was killed by Groa.