D'ni is a fictional civilization from the video game series Myst, created by Rand and Robyn Miller. It is known for its advanced culture, unique language, and impressive underground city, also called D'ni. The civilization is famous for its ability to create linking books, which allow travel to different worlds. The D'ni people are skilled in various arts, sciences, and architecture, reflecting their rich history and knowledge. Their society faced decline due to a catastrophic event, leading to the eventual collapse of their civilization. The remnants of D'ni culture are explored throughout the Myst series, captivating players with its depth and lore.