Bifrons

Bifrons is a Lich demon and Earl of Shadowfell.

Bifrons teaches sciences and arts, and the virtues of gems, woods, and herbs. He is able to gather corpses for use in necromantic rites or anatomical studies.

History
In ancient Rome, Bifrons was worshiped as Janus, the god of beginnings, gates, transitions, time, duality, doorways, passages, and ending.

Physical appearance
Bifrons' true form is that of a humanoid demon in the tattered robe of a philosopher, with two faces on the front and back of his head.

Etymology
The name of this demon refers to the ancient Roman god Janus.