Hand of Fate Part Two: Jack of Skulls
Buy this game on GoG:
http://www.gog.com/game/hand_of_fate
Buy on Steam:
http://store.steampowered.com/app/266510/
Part two of a playthrough. This is the second boss. Fairly easy at the start, the game becomes progressivly harder.
Obviously, you will want to use a weapon with Holy power for slaying undead :)