 His two spirit animal forms are the Xoloitzcuintli dog and the water salamander species known as the Axolotl.Xolos served as companions to the Aztecs in this life and also in the after-life, as many dog remains and dog sculptures have been found in Aztec burials, including some at the main temple in Tenochtitlan.Dogs were often subject to ritual sacrifice so that they could accompany their master on his voyage through Mictlan, the underworld.