You can use this whenever you need a prompt for some alien creatures. It's a bit limited at the moment, but I plan to add more variation and creature types, including androids and human-like characters.
Currently builds headshot prompts only, but you can of course easily modify the generated prompt for a full-body version. Or, use the headshots in HeroSheet if you have Google Flow (the full-body mantis-like creature below was done in HS).
Have fun!