I haven't messed around with AI much, but the one I use when I do isn't the most advanced, but I like how it's sign-up free, and doesn't tell you no, as far as I can tell. It's probably a few generations behind, or something, but again, sign-up free. Just tell it to do something, and it does. Mess around with if you feel like.

It's not "underground," or anything...but it's also not fucking Gemini, which is cucked, even for mainstream AI, from what I've seen and heard.

Here's a Roman general, according to it, in my first batch attempt.

It's got a ton of different modes. Here's the most basic:
https://perchance.org/ai-text-to-image-generator

Here's a more advanced one, that has its pros and cons. I like how you can tweak an image seed if there's something you like, here:
https://perchance.org/beautiful-people

Do note on that one, it can occasionally spit out NSFW even if you don't ask for it, since it also has an NSFW mode. Also, either version will rarely give you something you didn't ask for at all. Again, a little funky, definitely not the most advanced. But won't lecture you, ever, and doesn't need an email or anything.