Trolls

Trolls are horrid carnivores that are well known for being hard to kill. All trolls regenerate, and most can only be slain through the use of fire or acid.

Knock them down, then burn them

When a troll is knocked down, it is important to immediately apply fire or acid to its body — otherwise the troll will stand back up and return to the fight.

---

Source: bg2ee/original_manuals/baldurs_gate_2_ee_amn_survival_guide.pdf — "Some Monsters of the Sword Coast" → "Trolls".