A lich is a type of undead creature commonly found in fantasy literature and role-playing games. Typically, a lich is a powerful sorcerer or wizard who has achieved immortality through dark magic, often by binding their soul to a phylactery. This allows them to continue existing even after their physical body has decayed or been destroyed. Liches are often depicted as skeletal figures, wearing tattered robes and possessing formidable magical abilities. They are usually portrayed as malevolent beings, seeking to expand their power and control over the living. In many stories, they serve as formidable antagonists, challenging heroes and adventurers in their quests.