Itztlacoliuhqui- Aztec GodDeity

Birth from the Fallen Morning Star

In the mythic sequence recorded in the Anales de Cuauhtitlan, the creation of the Fifth Sun culminated in a confrontation between the newly risen sun and the morning star. After the gods sacrificed themselves at Teotihuacan to set the sun in motion, Tlahuizcalpantecuhtli — Venus in its morning star aspect — refused to accept the new cosmic order and hurled darts at the ascending sun. The sun struck back, piercing the morning star through the face with its own dart. In that moment of cosmic retribution, Tlahuizcalpantecuhtli was transformed into Itztlacoliuhqui, the god of frost and obsidian cold. His face became stone, bent and curved like a sacrificial obsidian blade, and a blindfold sealed his eyes shut. The transformation encoded a cosmological principle central to Aztec thought: the bitter cold that grips the earth before dawn, when Venus vanishes below the horizon, is the perpetual punishment of the defeated morning star, forever bent and blinded by solar power. His very name — "Curved Obsidian Blade" — preserves the shape of that cosmic defeat, the once-brilliant star now rigid and dark as volcanic glass.

Calendrical Associations and Iconography

In the tonalpohualli, the 260-day ritual calendar, Itztlacoliuhqui presided over one of the twenty trecenas, as documented in the Codex Telleriano-Remensis and Codex Vaticanus A. Depictions in these codices show a blindfolded figure bearing a curved obsidian blade and implements associated with punishment and cold. The blindfold across his eyes signified the permanent mark of his transformation — the blinding inflicted by the sun's retaliatory dart. Some codical representations render his body as partially stone, reinforcing his identity as a being frozen in the moment of his defeat.

His presence in the calendar connected frost and cold to the rhythms of ritual time. Periods under his influence were associated with harshness and divine retribution. Frost descending on crops was not simply weather but a manifestation of cosmic justice — the ongoing consequence of the morning star's failed rebellion against the newly established solar order. Offerings and observances during his trecena acknowledged the necessity of cold within the broader balance of the Aztec cosmos, where even defeated and punished forces served an essential function in maintaining the cycles of the world.