Usually passive until you get too close for comfort... Hits hard and has large HP pool. Very good candidate for "confuse" spell. Detection radius very low in the dark, for stealth characters. High EXP gain for a kill, just make sure you have the room to fight them. Friendly to no NPC other than gnomes, who are the only NPC that doesn't make them angry
The stronger variant of the troll is know as "Thumpus the Troll". In addition to a larger hp pool and damage output, he usually spawns with a small group of gnomes by his side.