Larloch, King of the Liches

Long has Larloch lived and long is the list of schemes and conquests he has carried out over the millennia from his seat in Faerun. Now his tendrils extend out into the multiverse as a being that can challenge gods and devils alike in pursuit of greater knowledge and the deeper mysteries of magic. His reasons for being in Covenant are unknown, but what is known is that his servant Pollux let him in. With a great "betrayal" of The Champions and in particular Jericho, Larloch was brought to the plane of Covenant where he battled and defeated the Demon Prince Graz'zt banishing the demon back to the Abyss. Afterwards he vanished but his sway over the plane grows. 
Larloch's powers are vast and are best represented by the Dozens of Ioun Stones that orbit the Lich King in his true form.
He appears as a often unbecoming undead in plain but fine robes, Larloch cares not for fashion or riches unless they aid him on his quest to know all the mysteries of the multiverse. When doing business with those his undead form might shock or disgust he appears as a Fatherly looking middle aged human male. Often Cloaked in common cloths with a simple circlet and perhaps a ioun stone revealed as a hint to his true power.