what's interesting is that the process of making a wraithguard and what a Revenant is supposed be are very similar.
basically the wraithguard is a 'super zombie' made by shoving someone's soul into a living body, thus making it a undeadish phylactery that is isnanely hard to kill. this process tends to wipe out memories of the person, save thier knowledge of thier own name. when it doesn't, they have to 'cleanse' the Wraithguard.
a revenant is a undead super zombie, made by a soul getting itself a new body. either a mage puts it in one, or a divine force does..usually to fufill a specific task. it may, or may not, have memories of it's previous life...and is notoriously hard to kill.
judging by that, and that lucan is an 'Arch-revenant' it seems my theory that Lucan is the 'original' Wraithguard is correct. he's the model that the other wraithguards are based on. and I bet the process involved the death of the Paladin he got his paladn powers stripped for.
it would also explain how learning the wraithguard creation process was the last peice of the puzzle that let opal figure out what lucan was, as she claims during the Freeport line.
which is even more amusing, since right now, the Temple of War has a spell that can outright destroy a wraithguard. and guess what orgainization Opal is in right now in one of her many guises.