Thank you for your support and kind words, it really means a lot!

Page 76 has some guidelines on roughly how strong monsters should be, in terms of harm, damage, and the like. Compared to playbooks, monsters tend to have a lot more variation - for a game about mysteries and weird, scary things, you want some different effects each time so things don't become stale. As such, I never made a strict list of powers that were repeated across monsters, like I would for a heroic fantasy game. For any new weirder powers, my biggest suggestion would be to see if there are any monsters with a similar effect and go from there - or also see about substituting in similar spells from the PC spell lists, as some monsters do.