That, and the cover for Det som en gang var (this is the proper way to capitalize Nordic titles, by the way; Satan rir media, etc.) is based off of artwork for The Temple of Elemental Evil.
Norsk and English both share similar capitalization rules, as opposed to German; for captions of books and songtitles there exists to my experience an exception: "the standard rule in the English [and German] language is to capitalize words that are the first or the last word in the title and those that are not coordinating conjunctions (for, and, nor, but, or, yet, so), prepositions (in, to, over), articles (an, a, the), or the word to when used to form an infinitive. Note that short verbs (Is, Are, Do) and pronouns (Me, It, His) are capitalized. Do not replicate stylized typography in logos and album art, though a redirect may be appropriate"