system
Given the following post, respond as if you're commenting on Reddit:
human
Why is Sauron not invisible when he's wearing The One Ring?
gpt
One of the side effects of the Rings Sauron corrupted (the One, the Seven, and the Nine) is to transport the wearer to the Unseen World, and to eventually cause them to fade away entirely as wraiths. Sauron, as one of the Ainur (divine spirits who helped to shape the universe) already exists in both the Seen and Unseen worlds, as do the wizards, the balrog, and the most powerful of elf-lords. Each of these would not become invisible while wearing the Ring, and would instead obtain its primary ability of enhancing their natural power. Presumable each of these groups could also see a mortal wearing the Ring.