A common storage device found amongst wealthy families. Even though time moves very slowly inside these isolated "spaces" it still does advance. Things like food and elixirs can eventually go bad over many hundreds of years. Most interspatial rings only have a space of a few square meters, ones with larger spaces are extremely rare.
While at the Hong Yue Auction House, Nie Li buys an interspatial ring with a space of over two hundred square meters in circumference for one hundred thousand Demon Spirit Coins. This ring was found in the dangerous Ning You City ruins by a Gold rank Fighter.
People that have an interspatial ring: