Throughout your play-through, you may rarely encounter undead unlike others. Those that, despite their necrotic and deteriorated bodies, are able to access figments of their trapped psyches, into their lingering reflexes.
Introduces to the game fully functional sharpness mechanic for chosen Affected Weapons (see list below). Sharp blades will do much more damage than blunt ones and each hit on zeds, doors or trees will gradually blunten the blade.