Glowcaps are a traditional currency among sporelings, which can be found all over Image:Achievement Zone Zangarmarsh.png Zangarmarsh. They appear as large red glowing mushrooms. They are used to buy the reputation rewards from Mycah, the Sporeggar Quartermaster, once you become neutral to the Sporeggar. (Herbalists used to be able see them on the minimap, though no longer as of patch 3.1.0.)