In one version of its second half, its heroine is 
In one version of its second half, its heroine is sliced by Hildebrand's sword, but her body only falls apart when she bends over. In its first half, that heroine decided to remain unmarried after dreaming of a falcon killed by two eagles, although she is wooed by a character who helps the men of Worms defeat the Saxons after stealing treasure from two dwarves. Though he bathed in dragon's blood, its hero is vulnerable on his back, where, with Kriemhild's help, Hagen spears him before throwing the hoard into the Rhine. For 10 points, name this German epic about Siegfried, the basis of a similarly-named cycle by Wagner.
In one version of its second half, its heroine is sliced by Hildebrand's sword, but her body only falls apart when she bends over.
{Nibelungenlied} [or The {Song of the Nibelungs}]