Complex sentence: Barker's original "Hell Priest" sketches for Pinhead were eventually adapted into an officially licensed mask by Composite Effects, to be released in limited quantity to the public on 24 March 2017 in celebration of the 30th Anniversary of "Hellraiser".
Split into simpler sentences: Barker's original "Hell Priest" sketches for Pinhead were eventually adapted into an officially licensed mask by Composite Effects, to be released in limited quantity to the public on 24 March 2017. This will be done in celebration of the 30th Anniversary of "Hellraiser".