 In the poem Helgakviða Hundingsbana I , the hero Helgi Hundingsbane sits in the corpse @-@ strewn battlefield of <unk> . A light shines from the fell , and from that light strike bolts of lightning . Flying through the sky , helmeted valkyries appear . Their waist @-@ length mail armour is drenched in blood ; their spears shine brightly : 
