Reincarnated as a demon inside a dungeon

Whenpeopledie,wheredotheyendupto?Idon'tknowaboutanyoneelse,butwhenIdied,IarrivedatthestrangestHeavenofalltimes.AndIgotachancetoreincarnatewithallofmymemories!Jackpot!IfyoulookawayfromthefactIhadtoreincarnateasadamnmonsterwhichisthelowestofallthebottomfeeders?AndIhadtorepresentoneoftheworstgoddessesever!?Andtomakethingsworse,my“birthplace”wasafreakingDungeon!AndnotyoureverydayDungeonwithlevel1slimesandgoblins,butafreakingDungeon-turned-world-destroying-facility!Still,yougottaworkwithwhatyouhave.SoseemehowIsurviveinthiscrazynewworld!!...ButIpromiseIwon'tbemadifthebossesgetdebuffed.No?Damn...