System: My Skills Can Be Superimposed Infinitely

This is a world where demons are raging and humans can only live huddled in a corner. But with the blessing of the upgrade system, all mankind has the power to fight against the demonic tide. Ling Xiao traveled back to his childhood, but he still chose to become a mage. Not enough mage blue? Skill cooldown too long? Obtain the magic book of the super artifact Al, Copy the opponent's skills and record that your own skills have no cooldown. "Mage? It's so miserable that so many monsters are close to him and he's almost gone." "Yes, as a mage, why are you walking so far ahead? Only warriors can resist it." "What? Why is this spell so stupid?" "Am I right? Ling Xiao can withstand the monster's attack with just a low-level shield?" Ling Xiao: "What a fuss, the low-level shield cannot be resisted, but I can apply it a hundred times and it will be fine." Ling Xiao's body was covered with more than a hundred layers of low-level shields. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.