Undead creatures are beings that have died but have been reanimated or brought back to a state of existence. They often appear in folklore, mythology, and popular culture, typically characterized by a lack of life signs, such as a heartbeat or breath. Common examples include zombies, skeletons, and vampires, each with unique traits and origins. These creatures are often depicted as having a connection to dark magic or supernatural forces. In many stories, they may be driven by a desire for revenge, hunger for human flesh, or a quest for immortality. The concept of the undead raises questions about life, death, and what it means to be truly alive.