(1) The Luremaster witnesses 4 knights kill a dragon, while their lord hides (2) The lord takes credit for killing said dragon (3) The Luremaster writes a poem, exposing the Lord's cowardice (4) The Luremaster is imprisoned and has his hands cut off by the lord. He keeps singing, so he has his tongue cut out by the lord. He dies. (5) The ghost of the Luremaster haunts the lord. The guards and servants all flee. The lord goes crazy and kills himself.
So far so good, right? The lord got what he deserved. He wanted glory, a "golden future", and instead he was driven to a lonesome death as a broken man. Justice served! But wait...
(6) The Luremaster goes on to haunt the castle. He binds the souls of the nobles and guards to it. He takes over the denizens beneath the castle. He fills the place with all sorts of traps and monsters. (7) The Luremaster lures in people from all over Faerun. He does not allow them to know what they are getting into, but once they are the castle he refuses to let them leave. (8) The only way out is to defeat the traps, ghosts and creatures within the castle. Failure means...having your soul bound to the castle. (9) He shows no pity to those who are not "heroes." They are doomed to die like everyone else. (10) We know that, at the very least, "hundreds" of innocent people have been killed by the Luremaster.
And for what? What is his purpose? For his story to be known? Common sense means that the guards and servants who fled the castle knew what was up. They would have heard the signing. Even the most obtuse person would realize "Hey...maybe the lord didn't single handedly kill a dragon?" So it can't be that. His story was already known.
For vengeance? He already drove the lord to suicide, and bound his soul to the castle like everyone else. He more than got his vengeance.
Because one must be a "hero"? It can't be that. Because he wasn't a hero. He was a bard who didn't fight the dragon, couldn't fight the lord...by his own standards of what a hero is, he didn't have the martial prowess to meet that.
From what I can tell, the Luremaster is just a jerk. He wanted to write a story about heroes, and was upset that the one time he got to witness real heroes he was killed for it. So now he has caused hundreds of people to die deaths, just as bad as his, because he wants to see a few more good fights.
I just find it ironic that in all of his self-righteousness, he has caused far more harm than his lord ever did. I don't think I have ever seen a character so completely without morals before.
I mean...Sarevok was willing to start a war for godhood. Sure. But he's got that Bhaalspawn essence going for him. And he can be redeemed if he finally starts hanging around with a good crowd.
Irenicus did horrible things, yes...but then again he had his emotions literally stripped away. Sure, he tried to reach godhood, but that's more arrogance than anything else. And from what we've seen, before he completely lost his emotions he did things like try to recreate his love, and to keep his close friends from death (though the fate of said friends became worse than death as Irenicus lost his emotions).
Out of all of the villains we have seen, is any as evil as the Luremaster without literally being a devil/demon?