Death Giant
Not actually giantkin, these cosmic beings occupy the Shadowfell, steal the souls of nearby mortals and use them to fuel powerful magic. For this reason, most death giants surround themselves with weak minions they can kill easily. A creature whose soul has been stolen by a death giant finds itself in an inky black void, along with any other souls the giant has collected until it is restored to life or the giant expends the soul, releasing it from its prison. When a death giant dies, any souls that it has trapped are freed in a wave of spectral energy.