This came from Age of Empires, where priests could heal units by shaking incense/holy water over them, including ones that didn’t make sense like trebuchets or seige rams.

FYI they made the Narnia movies from the most interesting and least convoluted boos. Lion witch and wardrobe is book 2, prince Caspian is book 4, and Voyage is book 5. I don’t believe they ever planned on doing the rest of the books. Book 1 and 7 both are some heavy allegorical books that probably wouldn’t translate well, book 3 has some serious questionable bits that would be seen as pretty racist these days. Book 6 could be decent, but doesn’t include the main siblings, so probably less interest from fans of the main actors.