Dream, along with his brother, Nightmare, was conceived from the Tree of Feeling by Nim to guard it as she was recovering from a deadly battle. She then gave them humanoid forms, but the two exploded as those couldn't withstand the emotional powers that the two emits. In a rush, she then created new skeletal vessels based on the first skeleton monster she observed, Swap!Sans. The vessels proves to be effective as the powers flows freely through the bones. [DREAMTALE]