Nancy was at a stormy metal rock concert when a powerful lightning bolt struck near the venue. Nancy was the only one who went to the scene of the strike. She found a hammer when she tried to pick it up. Her body transformed into that of this muscular Valkyrie when she finally lifted the hammer.

the character inspiration is base of the song stormbringer by the band deep purple and those heavy rock/metal covers art of the 80s and taarna from heavy metal