Okay... very, very rough idea of city crest. Grey, black, and yellow are the colours of Enworld, so I chose those for the colours of the crest. The gold circles represent coins, for this is the city of coins. They could be several different types, or all representations of Mor's End coinage. I'd suggest that this is not the original crest, but was developed after Mor's End became a trade hub - so within 150 years, IIRC from the history.
Though the coins seem too far down, I intend the space above to be filled with various other crests. For example, the city watch may have a lantern in the centre. The city guard may have a gate, while the castellan has a scroll, etc., etc. The crest is also simple, allowing it to be stiched onto the Muster's padded armour, painted on shields, and scaled down to form small badges of office and the like.
Lastly, this doesn't follow the rules of heraldry. Most notably, I've disregarded the law of tincture (metals must go on colors and vice versa). I feel this is justified by both historical precedence (most people never bothered) and the fact that Mor's End is a frontier to the wilds - who cares if the crest is by the book, as long as it lets us tell friend from foe!
The words, or course, are not part of the coat-of-arms. Again, this is a rough idea, made in paint. I'm sure I agree with any disparaging remarks about the quality of the drawing - it's just an idea roughly fleshed out, not at all what it'd look like finished.
