The very large, thick teeth located throughout the mouth of the nydus worm primarily serve as digging tools. Each fang is connected to a set of powerful muscles, which vibrate at hypersonic speeds in order to crush soil, rocks and everything in between. Eventually (mainly due to friction) the worm’s teeth wear down. Once a tooth becomes useless, it is ejected and a new one grows from the muscle itself in a matter of seconds. When the worm emerges, gigantic spikes protract from its body when it emerges, stabilizing the creature and supporting its weight while the Swarm advances from the depths of the nydus network onto its target area.