Barbarians who walk the path of the grave channel their rage from their own death. These barbarian are caught somewhere between life and undeath fueled only by their fury and revenge for the one that killed them. They are now a shattered remnant or shadow of the person they once were. Barbarians of this path find it hard to feel and express any emotion besides rage and hatred. This subclass is a perfect fit of your barbarian meets on unfortunate and early death.
Art by Pawel Latkowski on Artstation