Mictlan is the underworld of Aztec mythology. Most people who die would travel to Mictlan, although other possibilities exist. Mictlan consists of nine distinct levels. The journey from the first level to the ninth is difficult and takes four years, but the dead are aided by the psychopomp, Xolotl. The dead must pass many challenges, such as crossing a mountain range where the mountains crash into each other, a field with wind that blows flesh-scraping knives, and a river of blood with fearsome jaguars.