I'm still playing around with AI art for covers and have mocked these examples up.
Given how Wombo works, and the difficulty when it comes to human figures/faces, I think it's best to fully lean into the abstract aspects. I'm also hoping I might be able to lure some more mainstream horror readers over, and I think the usual smiling anime succubus might scare them off.
It's not ideal. That would be getting a decent fantasy artist and commissioning art similar to the old Weird Tales covers. I'm not sure I have the budget for that or even know where to find someone to do it. I'm also conscious I need to get these ebooks back up, sooner rather than later.
I think these are better than the Christmas example, but are they good enough?
(The Freedom one I think is, Halloween and Remembrance are borderline, but might be abstract enough to get away with it.)