Note: This information was taken from TSR's original AD&D adventure, the Temple of Elemental Evil.
For the players: A relatively short flight of stairs leads
down to a 20' long walkway, 10' wide.
To the north of the walkway is a pit, 20'
square and 10' deep. The floor of the pit
is slimy and covered with bones and
filth. The rough stone walls are pocked
with small openings near the floor, but
they become smooth and unclimbable
four feet above the floor of the pit.
For the DM: If more than 100 pounds of weight are on
the walkway while no weight is on the lower
stairs, a trap in sprung. The walkway is balanced
in a cupped socket, and the weight
upon it causes the ledge and seven feet of the
wall behind it to tilt sharply down to the
north. The smooth stone offers no hold to
the hapless victims, each of whom takes 1-6
points of damage from falling into the pit.
With the weight gone, the pivoting ledge
swivels back to its original position.
At the sound of victims falling into the
pit, 24 giant rats rush out from their wall
burrows, being trained to attack after that
stimulus. Victims lose all shield and dexterity
bonuses to armor class in the first round,
as well as initiative, but combat is normal
thereafter. Each round, 24 more rats rush
out and attack, until all 144 have arrived.
Giant Rats (144): AC 7, MV 12"/6", HD 1/2,
hp 4, 3, 2, 1 (36 of each), #AT 1, D 1-3,
SA 8 carry disease, XP 11 (x36), 10 (x36), 9 (x36), 8 (x36)
The rats have no treasure, but 1-12 of each
coin type (cp, sp, ep, gp, pp) lie scattered
under the litter on the floor. Searchers find
one coin per person per round until all are