"A dark and eerie underwater lair, illuminated by faint bioluminescent algae and glowing crystals. The cavern is vast, with towering stalactites and stalagmites covered in slime and strange runes. In the center of the lair, a massive Aboleth floats menacingly, its slimy, tentacled body glowing faintly with psychic energy. Its three glowing red eyes pierce through the darkness, exuding an aura of ancient malevolence."