I really like this piece! It's got a nice, dark motif to it and it has its own, unique style that doesn't immediately remind me of anything in particular while still being pleasantly familiar. I'm a big fan of the lack of any discernable face besides the lit eyes. Definitely dehumanizes the character. The weapons look appropriately weighty and the armor has a nice, assymetrical-but-still-planned vibe.
If I were to give one bit of negative feedback, it'd be the lack of any discernable feature to show the character as "Undead" like the title. No bones/meat exposed to really drive that small fact home. Still, very well done, I'm sufficiently impressed.