An Upgrade System

Can't practice because my muscles and veins are broken? It doesn't matter, as long as you have the super upgrade system in hand, you can gain experience by eating a meal, killing a monster, swallowing some medicine, or practicing a pill, or setting up a large formation, and you can level up with experience. I'm afraid that the experience is too low, but it doesn't matter. I doubled the experience card. It's not enough. I still have five times, ten times. The experience is exploding, and the level is rising! The genius of a big family, the genius of a sect, the young master of the royal family, or the peerless evildoer will trample all of you under his feet. But there is more than one system in this world...