A lich is a type of undead creature commonly found in fantasy literature and role-playing games. Typically, a lich is a powerful spellcaster who has achieved immortality through dark magic, often by binding their soul to a phylactery, a magical object that protects them from death. This transformation usually involves sacrificing their physical body, leaving them as a skeletal or decayed figure. In many stories, liches are portrayed as malevolent beings, seeking to expand their power and control over the living. They often command legions of undead minions, such as skeletons and zombies, and are known for their intelligence and cunning. Liches are frequently featured in games like Dungeons & Dragons and in various fantasy novels.