Lord of Our Sustenance, is a primordial creator god, a god of fertility and beginnings.
Tonacatecuhtli is the being at the "center" of existence, a place around which everything revolves but where everything is still and at rest.
With his wife, Tonacacihuatl , he resides in the uppermost heaven, Omeyocan, "Place of Duality" . Tonacatecuhtli is sometimes associated with Ometeotl (Lord of Duality) .
In the tonalpohualli, Tonacatecuhtli rules over day Cipactli (crocodile).