I noticed something after another playthrough of the lovely monster today. I'm sure this has been noted before, but just in case, I must express my disappoint.
It says in the Dracolich's bestiary entry that it was alive in prehistoric times (which also contradicts the Biblical 2000-year time passage thanks to the Christian God's inclusion) and was presumably long-dead by the time intelligent humans came around. It was also located in the near-uninhabitable Necromancer's Abyss, which also would make it hard for humans to get remotely close to it.
Why is all this a problem? You can see swords and spears sticking out of its bones. If it was dead before we got here, and no human save Gabriel was able to reach its corpse, how did weapons get in it?
Logical fallacy, thy name is Dracolich Titan.