Spineshiver Grove is located northwest of Evermore, across the bridge that’s west of the kingdom. Not far from the entrance, once you’re inside, is a grimalkin that will give you a sidequest. She will agree to go to your kingdom, provided you get rid of the monster terrorizing the forest. Head south, west and then straight south to find the monster in question, who is a Tainted Monster. Prangles is level 22 and is a whamster that wields a bow, so it’ll be easy to dodge its attacks. Once you’ve defeated it, return to Moggie May to finish the quest.