The first thing that comes to mind when most think of trolls is the creatures' power of bodily regeneration. So potent is this regeneration that the only way to overcome it is to exploit the troll's vulnerability to acid and fire. It is not enough to slay the troll with caustic or flaming weapons, though-even the smallest scrap of a troll's flesh can regenerate into a full-size troll given enough time. The only sure way to eradicate a troll menace is to burn the monster's entire body until nothing remains.