This wishing well is a little bit different. It doesn’t grant wishes in exchange for coins, instead preferring a friendly pat and a quick snack.
Some magical creatures control an old, deeper magic that mages can never tap into, regardless of skill. It is often called “luck” or “chance” and cannot be manipulated by the likes of humans and dwarves. Only a select few sorts, like the regal water wyrms, have any small influence over its effects, and even then only minutely. How it works is little understood, but as it often alters natural phenomenon, it may well stem from Nature’s original powers.
But feel free to make a wish, whether it comes true or not – the wyrm is always happy to get some attention.