In one meaning I am dark,
In another I am shiny.
In one meaning I come at the end,
In another I've fought many.
In one meaning I will come no matter how hard you fight,
In another I haven't been alive for some time but you wish for me to come and save you.
What am I?
I am small in size,
but very wise.
I tell many tales,
whether they be comedies or epic fails.
I am the mightiest thing the world can see,
For not even a sword can beat me.
If you want to know the answer it is
night and a pen