Necromancers

Individuals who are primarily concerned with raising the dead through different methods such as magic or science, however this ability can be of magical or scientific origin, some creatures can be undead that magically revive the dead, for example liches, Some vampires and some skeletal beings, they can also be living creatures such as dark wizards, some witches and some demons. Other necromancers use science as a method to revive the dead, for example Dr. Victor Frankenstein and Dr. Herbert West.