VALKYRIES - there would be six, nine, or thirteen VALKYRIES at a time. They would select among half of those who died in battle. And then bring them to VALHALLA. The other half would go to the goddess FREYA’s afterlife field FOLKVANGR. FREYA always had the first pick of the fallen Vikings.
In Norse mythology, a valkyrie is one of a host of female figures who decide who will die in battle. Selecting among half of those who die in battle, the valkyries bring their chosen to the afterlife hall of the slain, Valhalla, ruled over by the god Odin
Graceling (Graceling Realm, by Kristin Cashore. Fantasy section under C. In a world where people born with an exceptional skill, known as a Grace, are both feared and exploited, Katsa carries the burden of a skill even she despises: the Grace of killing.