Spitting crawler

A spitting crawler resembled the surface dwelling skink. Lithe of body, these creatures possessed froglike toes on their feet, but was their toothed bite which caused travellers in the Underdark the most concern. The bite itself is accompanied by the acrid dischargewhich gives the spitting crawler its name. Against metal, the acid burns an ever widening hole, potentially doing as much damage to a suit of armor, as might a rust monster. Spitting crawlers could not be stunned or affected by charm, sleep, or hold spells. Occasionally, these unusual beasts served as familiars of wizards, particularly drow wizards.