Shadow Fairy: My Magical Powers Come from League of Legends

The continent was left behind and was contaminated by ancient demons thousands of years ago. As a result, the living beings will be corroded by the demonic energy after death and turn into demonic corpses that only know how to kill. Shi An traveled through time and found that he couldn't even practice the most basic skills. Fortunately, he is bound to a League of Legends skill system. By killing enemies, you can gain attack power and automatically break through the realm. The demon corpses all over the world have become the perfect nourishment for him on his journey to immortality. With Shameless Golden Body to protect his life and Void Qian Yue running away, Shi An's little life was quite nourishing. Wait, what's going on with the newly unlocked Great Freedom Flying Technique? Why does it still have side effects?