Man the MC is so dumb some times, he practiced yin force to hurt enemies through their defenses but most super creatures have too thick skin and bones for it to reach the organs now he could explode the fairy's brain and he forgets all about it!
Is he really so stupid he asked his mother for a hyper geno art and 2 days later a anonymous person sends him an amazing art? Where did all this "training" to which you received?
I just realized after a short while, that I've been reading chinese novels so much that I don't even instinctively correct thunder attribute as lightning attribute like I used to in the beginning.