What about a caterpillar enemy? There can be two classes.

Murdapeed. Murdapeed’s are five-segmented caterpillar-like enemies that scoot and shimmy on the Overland\land levels.

Deathopeed- Deathopeed’s are eight-segmented caterpillars that scoot and shimmy around in underground based levels, and they have spikes and boiling spit that can be shot up to 5 blocks away. These projectiles cause 2 points of damage and can be dodged by jumping.