Dwarves and Gnomes

Humanoids the size of baby zombies living in small tunnels and caves with little rooms and mushroom gardens. Dwarf caves would be very small inaccessible to players unless mined out. Would be interesting to see gnomes living on the surface in mushrooms, perhaps underneath the giant ones in swamps and on mushroom biomes, could even add intermediate sized mushrooms so it’s more “smurf style”. Maybe some kind of barter system not based around emeralds? Could be neat