The universe of Warhammer 40k is a future world full of darkness and war. The entire universe is divided into countless galaxies, each of which is filled with war, conflict and chaos. Various races, forces and religions compete for power and resources in the universe, triggering continuous battles and bloody conflicts. Technology and magic are intertwined. Humans and other races use high-tech weapons and armor, and are also able to summon mysterious powers to fight. There are also various evil forces in the universe, including demons in deep space, heretical cults and corrupt humans. The entire universe is shrouded in a dark atmosphere, and endless war and pain constitute the theme of the universe. In this universe, only the most powerful races and forces can survive, while ordinary people can only survive in the shadow of war.