Note: This information was taken from TSR's original AD&D adventure, the Temple of Elemental Evil.
For the DM: In this area live four trolls, sentries for the Guards of the Great Temple and personal guardians of their high commander. Two will be here at all times, and all four during the night.

The trolls' bedding is piled in the northwest corner of the area, along with 4 small chests. The trolls drag out their bedding at sleeping times, and keep all their valuables in their locked chests; each has a key. Inside each chest are 15 cp, 13 sp, 10 ep, 19 gp, and 1-4 violet garnets (worth 500 gp each).

On the east wall is a huge painted mural depicting a great battle, apparently between the forces of Good and Evil. Therein, shining humans and winged humanoids are being blasted to the ground by blue bolts issuing forth from the fingers of a tall horned humanoid in wizard's garb. The painting cleverly conceals a normal-sized but stoutly reinforced iron-bound door. A corridor about 10 feet wide and 15 feet high slants off to the southwest.

Trolls (4): AC 4, MV 12 ", HD 6 + 6, hp 42, 38, 35, 30,
#AT 3, D 5-8/5-8/2-12, SD regenerates (3 hp per
round starting 3 rounds after being damaged), AL CE,
SZ L (9'); XP 861, 829, 805, 765 (525 + 8/hp)