Origin

One of the principal gods of the Aztecs, ruling over the lesser gods of the underworld. He and his wife also served as the guardians of the bones of all those who died including, the previous generation of gods. several gods however manged to take some of these bones back to the living plain where they would be used to create the mortal races.

For anyone who died they would give gifts to Mictlantecuhtli and his wife, to gain favor and ask for requests, including returning to life.

The worship of Mictlantecuhtli would include a portion where cannibalism was required, as a way to speed up the decomposition of another person, and bring them closer to the lower levels of the underworld.

Vertigo Comics

Mitctlantecuhtli appears as one of the prime villains for John Constantine,as he believes he is stepping into his business.

Lord Fanny has several meeting with the death god, in which he helps her by giving her powers, and showing her how to defeat several super natural enemies.

Dynamite Comics

Vampirella Vs Re-Animator

Notes: In this universe Mictlantecuhtli and Mictēcacihuātl are not true Aztec Gods they are aliens from Drakulon pretending to be Aztec Gods.

When Herbert West uses his Re-Agent to bring Mictēcacihuātl back to life she decides not to reanimate her husband and instead she chooses West to be her new partner. Then later when Vampirella uses the Re-Agent on Mictlantecuhtli hoping that the jilted lover would be her alley she is disappointed when the King of Dead goes back with his Queen and the pair plan on using West's portal and Super Re-Agent to open a doorway to Drakulon.

The pair later kill Vampirella but she brought back to life with West's Super Re-Agent and the heroine beheads Mictlantecuhtli with one swipe making the God of Dead permanently dead.

Powers

Being a god he is omniscient, he can control the dead and bring people back to life and kill them nearly at will.