Have us go to shaman trainer in orgrimmar to commune with a shaman. Idk which ones but someone can pick the three. After you pick you do a protect quest where u follow them to a spot where they channel and u defend them from increasing elementals. At the end u get the ability to change Ascendance form to a different form.
Maybe after the first channel quest u get an item and u have to bring it to a shaman from your home race town. Gives u a cool reason to go there again. Could be a fragment of some lore-accurate shaman thing idk.