[Beowulf's Funeral]

"On a height they kindled the hugest of all
Funeral fires; fumes of woodsmoke
Billowed darkly up, the blaze roared
And drowned out their weeping, wind died down
And flames wrought havoc in the hot bone-house,
Burning it to the core. They were disconsolate
And wailed aloud for their lord’s decease.
A Geat woman too sang out in grief;
With hair bound up, she unburdened herself
Of her worst fears, a wild litany
Of nightmare and lament: her nation invaded,
Enemies on the rampage, bodies in piles,
Slavery and abasement. Heaven swallowed the smoke."
(3137-3155)

Who seems to be the greatest enemy in this quote?