Advent of the Dungeon Master

Eric is a good and studious student who aspired to become a game developer. He was an orphan from birth and wanted to make a place for himself in this world before departing from it. But, fate was cruel to him and he was killed in a traffic accident. But, instead of going to heaven or reincarnating in another world as some hero, he reincarnated as a Dungeon Master of a collapsed and annihilated dungeon. But things just get worse with- [Quest: Repair the dungeon core and summon 5 monsters.] [Upon Failure: Death] "Shit... I guess I'll have t do this if I don't wanna die!" But all is not bad, since he is not alone. He has Corvis! His intelligent crow friend! Points to note before reading: 1) This story is going to have only one female lead. No harem whatsoever. 1.5) There's no romance too. 2) The magic system is unique and fresh, so you might enjoy that. 3) This story is NOT a smut. Don't expect tits and ass and tounges in this novel. 4) The MC is a bit evil at times. 5) Corvis plays a very big part in the storyline. 6) Cover image is AI-generated. 7) If you like boss fights, you'll like this novel a lot.