It written well enough...

But this is chapter 19x.

Chapter 19xx is the one in Nergals old house with the druid Tedor, the Shrike.
And the FoW.

Sadist indeed,
can't waste the precious experience points though

This is really good!
Can't wait for more

Not a bad battle scene. The only complaint I had was that 'boss' seems a little immersion-breaking, since it's a video game term. I would use "leader" or "commander" instead. :)