Tlahuizcalpantecuhtli

Tlahuizcalpantecuhtli (also Tlahuixcalpantecuhtli) is the Lord of the House of the Dawn, Venus as the Morning Star. Tlahuixcalpantecuhtli is a manifestion of Quetzalcoatl , who has Xolotl, Venus as the Evening Star as his twin brother.

Tlahuizcalpantecuhtli is a god of war.

In Teotihuacán Tlahuixcalpantecuhtli attacked Tonatiuh, the newly created Sun , by throwing an atl-atl dart at him. Tlahuixcalpantecuhtli missed. Tonatiuh threw a dart back, piercing Tlahuixcalpantecuhtli through the head. This transformed Tlahuixcalpantecuhtli into Itztlacoliuhqui, god of stone and coldness .

In the tonalpohualli, Tlahuizcalpantecuhtli is the Lord of the Day for days with number 12 (mahtlactli-omome in Nahuatl).