A skill largely unique to the The Darkness include any magical beings with a primary drive to devour or collect. More, and indeed, one of the defining factors of that People; however, it is not unique to them. On occasion, others have it, too, and it is a vision of terror.
To Devour is to utterly consume.
There is nothing left.
There is no waste.
Sometimes, there is not even memory.
Ironically, the A strange cultist focused on the weird idea that eating artefacts of power extends life, grants power, and gives wisdom. More cultists never have this skill. In fact, it’s a disqualification for joining.