Tezcatlipoca (Classical Nahuatl: Tēzcatlīpohca [teːs̻kat͡ɬiːˈpoʔkaˀ]) or Tezcatl Ipoca was a central deity in Aztec religion. He is associated with a variety of concepts, including the night sky, hurricanes, obsidian, and conflict. He was considered one of the four sons of Ometecuhtli and Omecihuatl, the primordial dual deity. His main festival was Toxcatl, which, like most religious festivals of Aztec culture, involved human sacrifice.
Tezcatlipoca's nagual, his animal counterpart, was the jaguar. In the form of a jaguar he became the deity Tepeyollotl ("Mountainheart"). In one of the two main Aztec calendars (the Tonalpohualli), Tezcatlipoca ruled the trecena 1 Ocelotl ("1 Jaguar"); he was also patron of the days with the name Acatl ("reed"). A strong connection with the calendar as a whole is suggested by his depiction in texts such as the Codex Borgia and Codex Fejéváry-Mayer, where Tezcatlipoca is surrounded by day signs, implying a sort of mastery over them.