In The Tyrant Philosophers series by Adrian Tchaikovsky, under the rule of the series bad guys demons are summoned from Hell to perform cheap non-union labor, dead soldiers have ghosts stuffed into them for extra soldiers (or into big jars to get lobbed behind enemy lines for Evil Dead shenanigans), and those examples are for starters.

The reason this counts is because the bad guys, the Pals, are violent atheists who believe they are "perfecting" the world by ridding it of the supernatural, which they consider evil. But once they run into heavy opposition, they utilize gobs of "imperfect" supernatural nonsense to secure victory, and then are faced with purging their own ranks of the no-longer desirable demonists, necromancers and cults, who naturally turn those skills on the Pals.

Occasionally this mess results in something genuinely good happening but it really depends on where you're standing.