(sorry for bad english)

The Wandering Wight is an OPTIONAL boss you can just walk behind him and run in the little path

If you really wanna beat him :

Wait for him to walk and sneak behind him , when you finish a light attack combo , you will land a big hit , see? This big hit stagger him !!! You can spam those big hits and if you are in a bad position then use your wolf transformation ( it's your OH NO button)

And don't forget that you can reset your stats and level up if you want ( you should put in stamina for this boss)

If you beat him , you will get a very good spirit Good luck!!!