The Eye of the Beholder
Unlike many other Dungeons & Dragons monsters, the beholder is an original creation for D&D, as it is not based on a creature from mythology or other fiction…
Isitoq (Inuit) - Also known as Cold Stare, Frost Eyes and Ice Watchers, these eyeball-like horrors are the spies and guardians of the vile Snow Queen. Their cold stares can freeze a creature into a thick layer of magical ice, they rarely kill interlopers, but mostly bring their icy statues before their Queen who collects them. The Snow Queen can also look through any of their many eyes and speak through their mouths.
'Spying Beholder'. A beholder’s central lair is typically a large, spacious cavern with high ceilings, where it can attack without fear of closing to melee range. Some beholders manage to channel their pervasive xenophobic tendencies into a terrible despotism. Rather than live in isolation to avoid other creatures, the aptly named eye tyrants enslave those other creatures, founding and controlling vast evil empires.