There are some arrows of fire and acid lying around in barrels throughout the Keep. Use a bow to shoot the arrows at the trolls as soon as you have them near death. Some lower level mage spells that will work : Burning Hands, Agazannar's Scorcher, Melf's Acid Arrow, Flame Arrow.
Well blimey if I haven't gone and forgotten me manners
Welcome to the board!!!
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Melusine, Archbabe of the Order of the Holy Flame and the Laughing Hyenas, &
Official Entertainer Elf of the BG2 Bar
Your voice is ambrosia
[This message has been edited by Melusine (edited 06-07-2001).]