Lair of the Mad Druid (5E)

From publisher blurb: A 5th Edition Mini-Dungeon adventure for 4-6 Characters Level 3 The forest primeval. Brave settlers seeking better lives gather their families and venture beneath her branches. They walk her leaf-dappled aisles, violate her ancient green stillness. They fell trees, build homes, plow the earth, and… vanish. The local magistrate, tired of discovering blood smeared doorways where she should find cringing taxpayers, hires the party to investigate the disappearances. Of course, she failed to mention her first wave of would-be settlers massacred a tribe of forest gnomes in the very valley where her peasants now disappear, nor does she know a forest gnome druid survived. A Mad Druid bent on vengeance for his murdered people.