Seraphic Euphoria, also known as the Plane of Thought, has no physical reality, only a mental reality. All souls exist in a state of shared consciousness, where physical barriers between communication, creativity, reasoning, and happiness don't exist. Besides souls, modrons take part in this communal mind-sharing. They are native to this plane, and obediently follow the commands of the souls they communicate with, providing anything necessary to further the innovation and discovery of new ideas.