@oristarA,
oristarA wrote:It's literarily fun.
If you say so. (rolls eyes)
literary [ˈlɪtərərɪ ˈlɪtrərɪ]
adj
1. of, relating to, concerned with, or characteristic of literature or scholarly writing a literary discussion a literary style
2. versed in or knowledgeable about literature a literary man
3. (of a word) formal; not colloquial
[from Latin litterārius concerning reading and writing. See letter]
literarily adv
literariness n
I presume that when you say "fun" you are implying that you were not looking for a definitive dictionary-type answer, which would be impossible, but rather that you were hoping for imaginative suggestions. There is a character called Sauron in "The Lord Of The Rings" who is described as the "Dark Lord", he doesn't really have anything so simplistic as an "opposite". "Satan", in a number of religions is supposed to be a supernatural being who is the personification of "evil", and in many (not all) cultures light=good and dark=bad so I suppose that "God" might be called the "Lord of Light" or something like that. Native speakers might not immediately gather what you were intending: a perception of ambiguity might arise because they might be aware of e.g. characters in sword-and-sorcery novels and computer games, the Hindu pantheon, white and black chess pieces, a science fiction novel by Roger Zelazny, etc.