GROAN Brutish notcturnal tree folk, with skin as thick as bark. AC 15, HP 30, ATK 2 greatclub +6 (2d6) or 1 rock (far) +6 (3d8), MV near, S +4, D -1, C +3, I -2, W -2, Ch -2, AL C, LV 6 Flammable. Take double damage from fire. Permanently turn into immobile dry trees if exposed to direct sunlight.
HONEYFUGGLE Man-sized flightless bees that take up residence in the civilizations of others through illusions and trickery. AC 13, HP 9, ATK 1 sting +3 (1d6) or charm, MV near, S +1, D +3, C +0, I +0, W +0, Ch +0, AL N, LV 2 Hallucinatory Pollen. Enemies who breathe within double near, DC 10 CHA or perceive the honeyfuggle as a trusted member of their own species for 1d8 days.
Think Invasion of the Body Snatchers, but they just want to move into the empty farm next door and have a secret hive in the basement and just blend into the village. Basically a Shadowdark version of a cuckoo bee, but not quite as sinister.
I think it's OK for the mysterious creatures on the edge of the town to turn out to be good neighbors who just don't want to have to build their own communities.