You must find and collect all of the Immortal Shards, and combine them. After the ritual is complete, a quest for only the most worthy warriors you must embark on. If successful, you will be one of the very few to call themselves.. one of The Immortals. Good luck on your endeavors, and may the gods be with you.
We never were too sure what this place was, all we know is anyone who went in, never came out. We've seen thieves, commonfolk, and even the most revered generals attempt to conquer this. Scripture says, he who sees it to the end, will be all powerful for the rest of time.. but will we ever truly know?