In Norse mythology, a valkyrie (from Old Norse valkyrja “chooser of the slain”) is one of a host of female figures who choose those who may die in battle and those who may live. Selecting among half of those who die in battle (the other half go to the goddess Freyja’s afterlife field Fólkvangr), the valkyries bring their chosen to the afterlife hall of the slain, Valhalla, ruled over by the god Odin. There, the deceased warriors become einherjar.
If you don't mind me asking - what's good about it?????