Time, Power, Space, Mind, Reality & Soul. The Infinity Stones each control an essential aspect of existence that they are Named after. When combined in their Universe of Origin, they give their wielder absolute control over their Universe at all points of SPACE-TIME. Whichever Stone you choose to purchase, its potential is limitless. However, you'll need an Infinity Gauntlet or any other item of power built to handle Universe-levels of power if you wish to wield more than one. Normally, the stones only work in their Home Universe, but these Stones will continue to function even outside their home universe, albeit severely weakened. The Six Infinity Stones are not actually stones; they just normally take that form, but they can actually be Rings, Gems, Planes of Glass, etc., if you want. They are also sentient and can communicate with you to help you learn how to use them better, as well as refusing to work with those you don't approve of. On their own, the Infinity Stones provide great power. But mastery of one stone will lead to greater power and easier mastery with the others.