In fact, the mask's raised turquoise may depict the wart-faced god Nanahuatzin, who, according to Aztec mythology, sacrificed himself to the fire and emerged to become the sun.
In ancient Aztec tongue, the name 'Axolotl' translates ... As legends have it, he was a monstrous dog that guarded the sun god and ushered souls to the underworld every night.