Shameless Mage is a Manga/Manhwa/Manhua in (English/Raw) language, Magic series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Strange events are popping up all over Earth. Desert rainstorms, sudden floods, and the appearance of supernatural abilities… When Xu Nan touched upon the power of the Prometheus World, he awakened the “Mage” class and saw a vision of the Earth being invaded. However, he can only level up through “shameful” deeds. The young mage sets forth on the Path of Shame…