Wyvern would be an obvious addition, of course ?

As for what's still legible on a tiny seal, the real-world options suggest there aren't many limitations - e.g. carved ancient Greek and Roman gemstones (sometimes used as signet rings), and especially the tiny carved stone cylinder seals and stamp seals used in ancient Mesopotamia and points adjacent, beginning in the 4th millennium BCE.

If the setting is meant to be ancient Egyptian or thereabouts, medieval Europe may not be the best comparison. Realistically, if the folks you're mapping for are trying to recreate such a setting, they should have done/be doing at least some basic historical/archaeological research first, before attempting any sketch drawings. These are a couple of very basic links that might help if you're having to try to do some of this work yourself:

and:

The second link has a lot of links to other sites which may also be of use.

Good luck!

@Loopysue - Yep, the video was on the homepage, though as it came up in the "recommended" list, I didn't need to use that to watch it.

Oddly, video 2 still hasn't shown-up in the notifications list for me, so I guess now it likely won't. It was odd that both video zero and video one were/are shown there, just not video two.

Haven't come across anything quite like this before on YouTube, though it definitely has its quirks - and I gather now also more ads, for which they're not going to be paying the affected video owners. Charming...

I was trying an experiment using the Black & White Towns style from the 2015 CA. Never having used it previously, I was following along with a printout of the PDF mapping guide. Most of the style is defined by various symbol catalogues, and accessing those was straightforward enough. However, when I tried to find the drawing tools, they don't load automatically with the style now, so for instance clicking the All City Drawing Tools button, as described in the PDF, simply brings up the default (colour) CD3 drawing tools.

I eventually located them - there are four "Par Lindstrom" drawing tool catalogues listed, so this is not a simple task - under "Annual Par Lindstrom City BW". This is particularly confusing, because when choosing the style from the New Drawing Wizard this comes up as just "Annual Par Lindstrom BW"! (Though you have to be looking among the "Cities" styles to find it, of course.)

While this is fine, and merely a minor irritation to someone experienced enough with CC3+ to get around this quirk, I can imagine someone coming to it fresh and following the directions in the PDF mapping guide might find this more problematic. Maybe the PDF mapping guide text could be tweaked to reflect what the process now is for loading the proper drawing tools for this style? Assuming it isn't some other glitch, that is (probably mine if so...).

Not sure it will work well enough, but for the pit, you might try drawing a thin line around the top edge of it on a Sheet above the rest of the pit, and apply the same Wall Shadow Effect to it as the rest of the level's walls already have. That should shade the pit the same way as the walls, and hopefully make it not so flat.