Rawhead Rex (1986)
Rawhead Rex is a 1986 British/Irish horror film directed by George Pavlou and written by Clive Barker. The film is about a monstrous pagan god's bloody rampage through the Irish countryside, and based on the short story by Clive Barker that originally appeared in vol. 3 of his Books of Blood series. Barker had previously worked on Transmutations (also known as Underworld).
More at Wikipedia.