Off the map

At the world’s end
Lies the darkest of dark.
With eyes of madness
And a trembling touch,
This creature angers much.

Where the shore drops from sight,
Where the sea crashes, deep,
Deep to oblivion,
Lies a den so great,
That water and air don't dare to enter.

A disc of gold glints,
Burning hotly.
Nestled as if in a mountain,
The sun casts her rage.
Suddenly,
Light reaches down to the deep,
And in the terrifying darkness,
The creature is vanquished.