The Lord is more alive than dead

all non-standard heroes have descriptions written for them

What do you mean by this? Perhaps you meant descriptions (or biographies)? If so, then yes, I didn't come up with them in a single day, and I've lost count of how many times I've revised them.

also, regarding the set, as I understand it, based on the presence of artifact shops, it can theoretically be collected

It can even be collected in practice, but only without fulfilling the Sphinx's condition.

I never got the ring; perhaps it can only be obtained in the pyramid

That's correct.