Here's a one-shot about the Witch-King, from when he got the first Ring of mortal Men to just before he became a Nazgûl, in his PoV.

Title: Drawn to the Shadow

Author: Dunruth Caryonde

Disclaimer: I own a copy of Battle for Middle-Earth 2: The Rise of the Witch-King.

Ah, my men are hard at work. Abysmal slaves, they.

Know they the touch of emotion? Fah! Expressions are for the feeble.

I am content with my tribe in Rhûn. I am Lord of many peoples of my land, and a powerful sorcerer.

Hmm? Whence came this? A ring? From Sauron of Mordor?

Powerful of status is he. Vast are his armies. I will accept his gift. I must try it on.

The Ring closes upon my finger like a squeezing serpent, yet I am enchanted by it.

I am suddenly stricken with the thought of Sauron as my master…and yet why not?

Its beauty is very great, yet wearing it I am urged to commit to the Dark Lord…

This may be an heirloom of our house, but incomparable to the mighty Ring he passed to me…indeed only Sauron deserves the greatest of treasures.

The outline of mine very soul begins to fade, I can feel it.

I realize that I have been shunned by my tribe. No emotion breaks over my face. Expressions are for the feeble.

I send more treasures to Him, almost daily now. They are justified for Him.

I must see the mighty Sauron, I must. It is my greatest desire as of late.

I am drawn to the Shadow, and none hinder me. Rather, they press me on.

I have left Rhûn, and nearing Mordor I feel my consciousness slipping.

My body is almost faded, and I am surprised to find out that I care not.

I meet with others like me before the great gate of the Black Land, yet they are less of stature than I am.

We enter Mordor through the gate, and my soul is escaping. I care not.

Barad-dûr, dominant pinnacle of Mordor, stands tall and unassailable above.

I am completely faded, and am no longer visible to the rest of the world. I care not. Expression are for the feeble.

The Dark Lord comes forth, and we nine raise our cold, shrill voices to the sky in tribute to him.

I only care about Sauron, my Lord and Master. I will fight and die with him.

I have been drawn to the Shadow. My soul is gone, and only darkness remains.