What? My System Only Has One Key!

[Double Transmission + System + Alien World + City + Establishing a Dynasty + War between Technology and Warcraft] Lin Yu, a poor boy who was despised in an aristocratic school, was bound to the system. Although the system was obtained, the system only had one upgrade. Except for the improvement of three basic attributes, there are no tasks or skills! But in a fantasy world, with one click to upgrade, the attributes are doubled! Facing the army of Warcraft, Lin Yu transformed into a superhero and fought against the Demon King Morse. You have just established a dynasty in another world, defeated monsters, upgraded, mined gold, and brought it back to reality to become a rich man. The real world wants Lin Yu to counterattack in another world? The story is not just that, whether it is the system or the invasion from another world, behind it is actually a game played by a higher civilization...