Death Eaters are the organization in the magic novel Harry Potter and the title of Voldemort’s followers. They are all supporters and believers of the Dark Lord. They were branded with the black mark on their left arm and were proficient in black magic.
The dark mark is the mark of Voldemort in Harry Potter and the Goblet of fire. Whenever Death Eaters kill people, they will leave a black mark on the top of the body or house. The dark mark is also regarded as the mark of death eaters, which is branded on the left arm of everyone who joins the ranks of Death Eaters.