>>715357254
You could probably go something with Folklore which has Christianity begrudgingly being cool with the supernatural as long as they show reverence to Jesus and are not evil.

With many of the supernatural that are friendly with Christianity turning around and being extremely hostile to other supernatural creatures especially if they harm humans

The sea bishop or bishop-fish was a type of sea monster reported in the 16th century. According to legend, it was taken to the King of Poland, who wished to keep it. It was also shown to a group of Catholic bishops, to whom the bishop-fish gestured, appealing to be released. They granted its wish, at which point it made the sign of the cross and disappeared into the sea.

There is also the legend of Pope Sylvester II and 'Meridiana' the Succubus.

Pressine and some Scottish king

There was also the debate about Cynocephalus and other creatures by 9th century monks and the story of Melusine who married a French king.

Thiess of Kaltenbrun a supposed werewolf who would lead invasions into hell with an army of werewolves to beat up demons