Complex sentence: Of course this is not the only description of a black dragon, just the most commonly accepted variation, as WOTC tends to stick to the artwork in the most current editions without any real regard to the artwork of previous editions.
Split into simpler sentences: Of course this is not the only description of a black dragon, just the most commonly accepted variation. As WOTC tends to stick to the artwork in the most current editions without any real regard to the artwork of previous editions.