Since medieval times, humans religions across terraria have been influenced by the dreams and nightmares that appear in their slumbers. Little do they know that many land rulers had their mid-sleep thoughts controlled by ancient monstrosity's know as the dreamers. It is said that the dream weaver is able to inflict positive thoughts and ideas in a humans mind, while the nightmare reveler inflicts evil intentions to the brain. Together, the duo creates balance between good and evil in the world, and work together against any pure evil, or wholeheartedness that may even shift the balance. Despite their great duties to terraria, no good thing can last forever. One, fateful day, a powerful being from another dimension know only as Cthulhu rose. In an attempt to bring down this pure evil, the dreamers were unluckily struck down with incredible force. Cthulhu's mechanical menace was given the order to inject these protectors with a special serum that had the ability to control one's mind, the mechanical scourge was able to make them corrupt every monster mind they saw, and, unfortunately for you, humans are currently their next target. Humanity's only hope is to either destroy them, or die.