Know thou enemy.

Every particular beholder breed belives that it is the paragon of "beholder-hood"

"Knowledge is power"

"Amazing! I just ran into beholder that looked almost exactly like you, except for the stripes on its flanks"

Storytellers always begin with tales of battle by recounting the past victories of the defeated creature. This recitation ends with the phrase, "then it met me"

Can beholders be eaten? Yes, but they taste extremely bad

What is the best way to kill a beholder? Hire some one far, far stronger than you to kill it

Pyramid of Enemies. Prisoners are brought here and told that if they can get to a certain height on the pyramid before a predetermined amount of time, they can go free. If the frantic prisoners reach the agreed upon height, the waiting beholders turn them to stone. For this reason, mostof the victims on the Pyramid of Enemies are looking upwards, searching for a salvation that they will never find.

At one point in the past, they created a beholder-shaped ship the size of small moon; this ship was capable of destroying worlds