Euclid is a planet and the main setting of Alchemical Blood. It consists of five distinct continents surrounded by an ocean. The regions are split into distinct landmarks known as Nuyö, Hala, Aiola, Muné, and Thales. It was created by the god Xeren.
The regions of Euclid consist of the five continents and the cities across them.
The weather on this planet varies depending on what continent/region one is in.
- The name Euclid comes from a Greek mathematician, often referred to as the "father of geometry".