Kriestlen

Located at the edge of a peninsula, while there are ways to get there by land, most notable one is Teaway connecting it to the trade hub, Honain.
This city would not be as significant if not for the surrounding plains being extremely fertile land for growing tea.
Such good conditions and deeply-rooted cultural practices make tea from this region more valuable than gold.
It of course helps that whole northern hemisphere has tea drinking traditions ingrained in most of the societies.
The tea leaves, slightly curved on the sides with deep-yellow coloring contrasting with maroon center, are easily recognized anywhere.
Not only that, but the scent filling the space during the brewing seems almost otherworldly, one can distinguish honey and elderflower. It also gives off a feeling of ease and comfort.
The firmly established cultivation practices, craftsmanship are passed down through generations ensuring continuity, while also providing way of innovation.
The stability tea provides for this region in terms of economy makes it beneficial for entire families to focus only on the improvement of practices. Everything else will be taken care of by the land.
There were many attempts all over the globe to replicate the flavour, while some were successful, no one was efficient to figure out the medicinal properties of the Kri Tea.
It would be lucrative endeavour for anyone to make a copy of it, but even the attempts with the soil, perfectly the same climate created by the experienced mages and samples provided the exact results.
It is currently believed that the surrounding mountains might have something to do with it, but it is unlikely, locals say.
At this point any idea is a sound one as people are desperate to try to replicate it and finish the monopoly of Kriestlen.