maybe not a horsemen, but a horse? but Lith doesn't need a magic tower... though of course the royals don't know that...
likely not a thing, but someone?
if its someone then it should be an undead.
if its a thing, then an artifact
Does the tower still have the additional floors from the solith form or did that get undone after they separated? Cause if not then we need to hear about them!
the royals finally understanding lith isn't some devout member of their guard he's the equivalent of a very gifted mercenary that helps his home country that his family likes living in