The swallower of the changing whirl[[311]].
And this rhyme too:
The dreadful dweller of the cave
Great strokes and many 'gainst me drave;
Full hard he had to strive for it,
But toiling long he wan no whit;
For from its mighty shaft of tree
The heft-sax smote I speedily;
And dulled the flashing war-flame fair
In the black breast that met me there.