Warlords of Sigrdrifa Rusalka Light Novel

The arrival of mysterious invaders known only as the Pillars threatens to wipe out all of
civilization. Now humanity's last hope rests in the hands of the Valkyries, young women
bequeathed with supernatural aircrafts by the god Odin to send the Pillars cast back
whence they came! A sky-high fantasy from the author of Re:Zero!