Complex sentence: The DC Comics Hell is a debased reflection of Earth, so as Earth became more technologically or socially advanced so does Hell, due to an effect not unlike time dilation "(a) day in Hell is equal to a minute's passage on Earth".
Split into simpler sentences: The DC Comics Hell is a debased reflection of Earth, so as Earth became more technologically or socially advanced so does Hell. Due to an effect not unlike time dilation "(a) day in Hell is equal to a minute's passage on Earth".