[noptic]

Troll description from From D&D:

"Trolls are infamous for their regenerative abilities, able to recover from the most grievous of wounds or regenerate entire limbs given time.

Severing a troll's head results merely in temporary incapacitation, rather than death. After cutting off a troll's head or other limbs, one must seal the wounds with fire or acid to prevent regeneration.

Because of this, most adventurers will typically carry some sort of implement capable of creating fire."

IMPORTANT NOTE: So not take this literaly.

Diping a Lodsys exec in acid sounds like fun, but you will get in serious trouble!