I spotted a few more new Lovecraftian-adjacent style-guidance plugins (LORAs), free for the free Stable Diffusion 1.5.

Transparent Specimen LORA, giving an x-ray creature effect. Perhaps especially useful for those making old 1920s x-ray plates, as part of a RPG game?

World of Green Mist LORA, looking very suitable for Innsmouth pictures, though you may want the Sponge tool in Photoshop to tone down the end results. It could be used with the also-new Creature in Myst LORA.

Starry night, for generating an Earth landscape with a starry night sky and moon.