Watchers

Watchers are triple faced, and triple bodied creatures that watch over an invisible gate that gave entrance to Mordor. Their three faces resembled those of a vulture, and bodies resembled that of a man.

Purpose
The Watchers were there to watch over the gate and to notify a force if necessary. These creatures were chosen because of the fact that they could raise the alarm to a force many miles away. Even so there was one way that was said to gain passage through the gate. One could not pass by strength of arms but would be able to pass by having a will and malice greater than that of the Watchers.

The Gate
The gate that the Watchers guarded was on the west wall of Mordor, near Cirith Ungol, where the great spider Shelob lived. Those who chose to bypass a confrontation with Shelob would have to try to pass through the invisible gate into Mordor, if they knew where it was.