Sentence:  The faithful Zoroastrian has never had anything to do with Ahriman but to fight him and destroy his creation. It was a veritable emancipation for <WSD>devil-ridden</WSD> souls, ever cringing with fear before powers of darkness possessing vague but intensely real capacity for mischief. 
Meaning of the word marked with <WSD> tags:  Plagued or dominated by the devil or devils.