Are you frightened yet, Piotr? If not, you are even more foolish than I thought.
The deeper you descend into the Underdark, the more horrible and twisted the creatures become. One of the most gruesome and evil creatures you can ever meet is something called a beholder. I pray that you should never be so unlucky as to run into one of these aberrations, but just in case I will tell you all that I know.
One glance at a beholder is enough to assess its foul and otherworldly nature. Aggressive, hateful and greedy, these monsters dismiss all other creatures as lesser beings, toying with them or destroying them as they choose. A beholder’s spheroid body levitates at all times, and its great bulging eye sits above a wide, toothy maw, while smaller eyestalks that crown its body twist and turn to keep its foes in sight. When a beholder sleeps, it closes its central eye but leaves its smaller eyes open and alert.
The only beholder I have even heard of in my travels was a beholder infected by the Shadow plane and twisted even further by negative energy. This particular creature was named Tlaxanar. A master strategist, whenever Tlaxanar attacked an enemy, he would catch them off guard by attacking flying enemies from below or swooping down on ground troops from above. Tlaxanar’s central eye created an Antimagic Cone that could Break the Resistance of even the most powerful magic.