Riddle!?

I am the god, dreaming,

Inside the womb of the world,

I come for your soul,

Inside your dreams I rule,

Knowing, my curse all too well,

Devouring the first and the last.

I am the one that wellcomes the demons

To take his soul away

Just for a while, forget, dream, be mortal...

Then arise, my darkened wings, spread across the world

I know not peace, i know not war,

I feed with war, i lust for peace,

My very essence rejects my making,

Riddle me this, riddle me that...

Who am I?