Mictlantecuhtli is the Aztec god of the underworld, known as Mictlan. He is often depicted as a skeletal figure, symbolizing death and the afterlife. As the ruler of the dead, Mictlantecuhtli oversees the souls of those who have passed away, guiding them through the underworld. In Aztec mythology, Mictlantecuhtli is associated with various rituals and offerings meant to honor the deceased. He is often paired with his wife, Mictecacihuatl, the goddess of the underworld, and together they represent the duality of life and death in Aztec beliefs.