I haven't spot any flaw or maybe i just miss it...ah there are some but it okay pass it and the story begin to be interesting ... This is story about mc transmigrated to world of summoning but the world already meet its end... Human about to lose so they live like dog... Sumoner lose their ability because some kind of barrier lock the spirit world or somethingThe mc can summon human from earth and gain strength from them when they growth....hmmmm....oh they can awaken some kind of superpower... I'm sorry if it hard to read but if you understand please give it a try...