Bite Attack: Although generally slow-moving, the spitting slug possesses a muscular internal “mouth” that it can extend outward rapidly to engulf a limb-sized object and latch on. Inside its mouth are small spines that secrete a paralyzing toxin (save vs. Paralysis + Constitution bonus or be unable to move) and digestive acids dealing 1 point of damage per round for as long as the slug is attached. A character wearing armor automatically saves, and does not take the acid damage* (see below). Characters that are affected by the toxin get a save each round to overcome the poison. If the victim is not paralyzed, treat this similar to wrestling with the victim as the defender.

Swallow Whole: A slug which has successfully paralyzed its prey will attempt to swallow the victim, expanding its body to fit as much food as it can. Most human-sized creatures take 1d6+3 rounds to be engulfed, and as little as 1d4+1 rounds for smaller PC races. Even when engulfed, a victim may continue to make a saving throw or try to escape if not paralyzed. Any attacks against the slug while it is attached will deal half-damage to the victim.

Acid Spit: Additionally, true to its name once per day the spitting slug is able to spit a glob of its digestive acid that does 1d8 points of damage + 1 point of damage per round for 3 rounds on a hit (a save vs. Death Ray + Dexterity bonus negates the damage per round). Armor may also negate the damage from the acid*. The acid is stored in special glands within the slug, so simply touching or even stabbing into the slug will not cause the object to dissolve.

Acid Dissolves Armor: *The acid is capable of dissolving armor. Every point of damage from the acid reduces the armor’s AC by 1 to a minimum of 11, at which point the armor has dissolved beyond being useful, and the acid thereafter deals damage to the victim instead.