Swarm

Living entirely underground, the Swarm are a civilisation of intelligent and mostly benevolent being that take up dwelling in vast tunnels.

Every swarmling is born as a larva, which can be turned into cocoon and then into Scarabs, Burrowers, Arachnids, and the fierce Naga.

They dig tunnels underground and attack from below, preferring to assault barren land or unfinished buildings.