Mistres of darkness

 There is a woman who lurks in the dark.
Watching, waiting for those with dark hearts.
She is the mistress of darkness guiding those  
who have lost their hearts to the darkness,
the darkness that lies within all hearts.

The mistress is nothing more than a mere shadow, a shadow
That hides at every corner, waiting for your heart.
When she thinks the time is right she will strike, swallowing you into the beautiful night

Once you're in her trap there is no escape, the darkness will get closer and closer. You will be in a land with no light until the very end. The end is when you disappear from the world and you will never be seen again.