Ungoliant

Evil incarnate from the depths of night
A monstrous creature that hungers for light
Corrupted by Melkor to do as he says
This hideous spider, unwillingly obeys

Telperion and Laurelin shone brightly this night
These trees of the Gods, created for light
All around Valmar shone silver and gold
Melkor seen this and his grew cold

Over the fields of Valinor she came
The fear of Melkor drove her insane
To the mound where the trees did grow
Melkor struck both with a mighty blow

Their sap poured forth as if it were blood
Ungoliant drank as fast as she could
All across Valinor darkness did reign
Their evil achieved: the trees lay slain