Death. A familiar concept that every living being knows but only a handful truly know the nature of death. Luka for one has experienced the cold and dark abyss of death firsthand. Although it's not at the same level of comprehension as the main character of our story, people who've gone through near-death experiences have some level of comprehension of the concept of death.
Experiencing death or almost experiencing death may be a way to comprehend it, however, it isn't the only path to comprehension. Some people prefer the direct opposite method. Instead of experiencing death themselves, they deliver death to others.
One such man is Malcolm. Since young, he has had a fascination with death. He enjoyed watching life fade away from his victims' eyes. He murdered his entire family at a young age and landed at an orphanage, after which that same orphanage 'mysteriously' burned down to the ground. Everyone inside was trapped and burned to death.