Xolotl

Xolotl, sometimes known as the "Lord of Darkness," is an antagonist in Book of Divine Beings.

Physical Appearance
Xolotl has a similar build to his light-based counterpart Quetzalcoatl. However, his skin is black and his markings are dark purple. His neck, thighs, hands, and the tip of his tail are covered in a coat of dark-orange feathers with purple tips. His wings are the same color in contrast to Quetzalcoatl. He has a dark purple orb attached to his head.

Personality
While Quetzalcoatl is benevolent and kind, Xolotl serves as a stark contrast. He is fundamentally wicked and destructive in nature and has no regard for life. He is also manipulative and calculating, being able to keep his desire for death and destruction from clouding his thinking capacity.

Supernatural Condition
As a god, Xolotl has physical and mental abilities far surpassing that of mere mortals, though there are exceptions. As Quetzalcoatl's dark counterpart, he is more powerful than an Aztec deity can ever imagine.

Darkness Control
Fittingly, Xolotl can manipulate darkness, being able to instill eternal darkness upon the world. Those foolish enough to challenge Xolotl are swallowed by darkness.

Necromancy
Xolotl has the infamous ability to control magic involving death energy, being able to use it to kill countless people, mortal and immortal alike.

Immortality
Xolotl is immortal and cannot die of natural causes or human means. However, he can be killed by extraordinarily powerful beings.

Trivia

 * Xolotl is loosely based on an Aztec deity of the same name. However, while his original counterpart is depicted as a jackal wearing a skull, this incarnation of Xolotl serves more as Quetzalcoatl's dark personality.