Trolls are horrid carnivores found in all climes, from arctic wastelands to tropical jungles. Most creatures avoid these beasts, since trolls know no fear and attack unceasingly when hungry. Their frame appears thin and frail, but trolls possess surprising strength. Their arms and legs are long and ungainly. The legs end in great three-toed feet, the arms in wide, powerful hands with sharpened claws. The trolls' rubbery hide is colored a moss green, mottled green and gray, or putrid gray. A writhing hairlike mass grows out of their skulls and is usually greenish black or iron gray in color. Their dull, sunken black eyes possess 90-foot infravision. Females are easily distinguished from males; they are both larger and more powerful than their male counterparts.
Trolls walk upright but hunched forward with sagging shoulders. The trolls' gait is uneven and, when running, the arms dangle free and drag along the ground. For all this seeming awkwardness, trolls are very agile. They are masterful climbers and can scale even sheer cliffs with an 80% chance of success. Trolls have a poor hearing, but their sense of smell is superior.
Trolls have no language of their own, using "trollspeak", a guttural mishmash of common, giant, goblin, orc, and hobgoblin. Trollspeak is highly transient and trolls from one area are only 25% likely to be able to communicate with trolls from another.
Trolls attack with two clawed hands and their bite, and they can attack at multiple opponents. In the rare case that a troll wields a weapon, it attacks with a +8 damage bonus. Trolls regenerate at an amazing rate. Starting three rounds after first blood, the creatures recovers 3 hit points per round until healed. Trolls reduced to 0 or fewer hit points fall to the ground, incapacitated but not slain. Incapacitated trolls continue to regenerate and stand up to fight as soon as they have a positive number of hit points.
When using an edged weapon, it is possible to sever the thin limbs of a troll (a natural 20 with an edged weapon is needed). Severed limbs continue to fight after separation from the body (hands squeeze, heads bite if stepped on, etc.). Attacks by severed limbs are at normal chances to hit. Separated limbs fight for the remainder of the battle, then scuttle back and rebind with the body once the battle is over. Limbs unable to reach the body to die within 24 hours, but this is of little consequence since trolls regenerate lost body parts (including the head) within a week. If a troll is dismembered and scattered, the largest surviving piece regenerates. The others die within one day if they cannot rejoin that piece. Only fire and acid cause permanent damage to trolls. These forms of attack destroy its regenerative ability. A troll reduced to 0 or fewer hit points and immersed in acid or burned with fire is killed.
Trolls have no fear of death, and launch themselves into combat, flailing wildly at their opponents and biting whoever comes closest. They occasionally (25%) throw stones before closing with their victims. Thrown stones have a maximum range of 20 yards, weigh 10 to 20 pounds, and inflict 1d8 points of damage. If confronted by a large natural or magical fire, trolls try to find some way around the flames. Trolls combine a ravenous appetite with limited intelligence, so they are frequently distracted and break off pursuit 50% of the time to pick up food dropped by fleeing prey.