Original sentence: The first bands to pioneer the style were mostly thrash metal bands that formed the prototype for black metal in the early 1980s; they are referred to collectively as the First Wave, and consist of a few bands, such as Venom and Bathory
Edited sentence: The first bands to pioneer the style were mostly thrash metal bands that formed the prototype for black metal in the early 1980s; they are referred to collectively as the First Wave, and consist of primarily four bands, Venom, Mercyful Fate, Bathory, and Celtic Frost