Saw this on broker earlier. I assume it's a glitch of some sort, since I can't seem to find anywhere to buy it directly from the site & don't recall ever seeing anything about it announced.

Same appearance as a greater dye, but mirrors enhanced essence wording as opposed to mystical or regular. Don't know how it happened, just that it exists now. Last time I checked, it was still listed.

Just a very old item. There are only a handful left in the game at this point.

They are still functional - I just tested to make sure.