Genius cultivator in the apocalypse

#WPC 274 - Cultivation Gran Blew was a genius of the mysterious Blew clan who lives in the mountains. The Blew clan was a clan of cultivators who hid their cultivation from the world and only appear as an economic empire. By 15 he has reached the peak of qi refining and has no way to breakthrough, not because he is untalented but that's the limit of this world! One day everything changed, in his search for a breakthrough method, the apocalypse descended upon the world. Would he find the answer to his problems in this new era of zombies and magic? With his qi refinement realm, how would he fit in when the world starts to use mana? Cover image is not mine.