Demon Assimilation System

200 years ago was the start of the apocalypse, earth was invaded by an Alien species known as the Kholbals bringing Mana with them, Receiving the blessing of mana shook the earth bringing about dungeons filled with danger as well as opportunities, Ranked from F rank dungeons all the way to SSS ranked , similarly the population gained affinity to mana ranging from F rank to the legendary SSS Rank and therefore the ability to become mages based on their talents and hard work, as well as different resources found in the dungeons. Our MC Alexander Lufrien , son of Rank C superhuman Greg Lufrien and Rank D Angelica Lufrien was given a ring by his parents when they went to join the war against the Kholbals , they tragically died in the war leaving Alex with the money they had saved in their lifetime and the single ring they had left him to remember them by. What secrets does the ring contain??? find out in the novel.