Riddle Me This

I wrote this riddle for my 8th grade students who are studying the Middle Ages this year. The poem is in the style of the Anglo-Saxon riddles found in the Exeter Book. At least one of my students got the answer. Any guesses?

With brandished blade             the wind I beat
When broken is the belly          that bore me.
The sun strengthened                my war-sword,
And the sky I sought                  to assail.

As my gore-blade grew              it became golden.
A stiff sword                                 in battle me slew,
And my body broken                  was crushed and burnt.
My destroyers devoured me     in their dens.