A Delver resembles a cross between an enormous centipede and a slug. A delver is roughly 15 feet long and 12 feet tall. It has a huge mouth and slits for eyes. A delver has spongy flipper-like arms, each of which ends in six black digging nails. A delver’s ability to sense vibrations gives the equivalent of Darkvision with a 60-foot range.

A delver prefers to fight from its tunnel, lashing out with its two flippers, causing 1d6 points of damage each (plus the corrosive damage noted above) while the tunnel walls protect its body.