On the shorter and slighter end of the troll size spectrum, forest trolls have long, willowy limbs adapted to mimic the texture of tree trunks and branches. Indeed, this skin is so similar to genuine bark that often flora will start to grow between and through cracks and crevices. The trolls encourage and even cultivate these so as to enhance their camouflage. Forest trolls tend to consume large amounts of birds who make the unfortunate and fatal mistake of building a nest on them. Their scythe-like claws allow them to easily cut paths through the brush, and make short work of any creature they come across.

On the shorter and slighter end of the troll size spectrum, forest trolls have long, willowy limbs adapted to mimic the texture of tree trunks and branches. Indeed, this skin is so similar to genuine bark that often flora will start to grow between and through cracks and crevices. The trolls encourage and even cultivate these so as to enhance their camouflage. Forest trolls tend to consume large amounts of birds who make the unfortunate and fatal mistake of building a nest on them. Their scythe-like claws allow them to easily cut paths through the brush, and make short work of any creature they come across.

Born with horrific appetites, trolls eat anything they can catch and devour. They have no society to speak of, but they do serve as mercenaries to orcs, ogres, ettins, hags, and giants. As payment, trolls demand food and treasure. Trolls are difficult to control, however, doing as they please even when working with more powerful creatures.

Regeneration

Smashing a troll's bones and slashing through its rubbery hide only makes it angry. A troll's wounds close quickly. If the monster loses an arm, a leg, or even its head, those dismembered parts can sometimes act with a life of their own. A troll can even reattach severed body parts, untroubled by its momentary disability. Only acid and fire can arrest the regenerative properties of a troll's flesh. The trolls, enraged, will attack individuals making acid and fire attacks against them above all other prey.

Troll Freaks

Their regenerative capabilities make trolls especially susceptible to mutation. Although uncommon, such transformations can result from what the troll has done or what has been done to it. A decapitated troll might grow two heads from the stump of its neck, while a troll that eats a fey creature might gain one or more of that creature's traits.

Troll

Loathsome, Regenerating Lurker

Trolls creep forth to prey on smaller creatures and drag captives back to festering lairs. These misshapen brutes can regenerate from wounds and regrow severed body parts—including their heads. A troll's severed limbs continue to move and attack. Unless they're burned by flames or acid, trolls can recover from egregious wounds and seek revenge on those who felled them.

Trolls typically hunt alone, but small groups occasionally cooperate to ambush prey or raid villages. Creatures such as hags and hill giants might convince trolls to work for them in exchange for disgusting meals.

Huge, rangy humanoids with lumpy grayish-green skin and regenerative powers

Trolls are huge, rangy humanoids with lumpy skin that is a dull grayish green in color. They stand up to 9 feet tall despite having a rather hunched posture, and may weigh as much as 600 pounds. Their skin is rubbery and slightly damp to the touch, and they have long sharp black claws and long sharp white teeth. Trolls have a disconcerting tendency to smile toothily most of the time, as if their brutal lives are the most entertaining thing imaginable. Trolls speak a primitive language, and are often fluent in Goblin, Hobgoblin, Orc, Ogre, or Giant depending on which of these species live nearest them. A few (20% or so) speak Common. Trolls are hateful creatures, reveling in combat and bloodshed. Though trolls could easily use a variety of weapons, they much prefer the sensation of flesh being rent by their teeth and claws.

Intelligent, wicked, 8' tall humanoids with emaciated, rubbery bodies. Consume the flesh of other humanoids. Dwell underground, in barren wilderness, and in the ruined homes of former victims.

Huge, rangy humanoids with lumpy grayish-green skin and regenerative powers

Trolls are vile, putrid creatures found in almost any climate. They can attack up to three opponents at a time using their powerful limbs to claw and their wicked teeth for biting. After three rounds of combat, their innate regeneration ability will start working, recovering 3 hit points per round. Their ability to regenerate even allows detached limbs to reattach to their body. Severed limbs will even continue to attack foes independently. A troll can only be truly destroyed by fire or acid, and these type of damage cannot be regenerated. Description: The hides of trolls are a sickly green or grey and they have cold black eyes. Treasure: Lair 1d8×1,000 cp (10%), 1d12×1,000 sp (15%), 1d8×1,000 ep (15%), 1d6×1,000 gp (50%), 1d10 gems (30%), 1d6 jewellery (25%), 2 magic items or 1 potion (15%).