The text has tactics for the Big Bad, and the AP as a whole gives enough information to roleplay said character well enough. What doesn't get a lot of description is his weapon, the Burning Glaive. It's intelligent, can communicate via speech and telepathy, and has a dedicated purpose. It even has dancing! It's almost an NPC in its own right.
For those of you who've finished this AP, how did you (or your GM) roleplay the weapon? Was it ever at odds with Karzoug? Did it attempt to confound the enemy with major image, or did it just silently chuck a fireball each round on his behalf? If your party was victorious, what was the weapon's fate? Did you destroy it, leave it where it fell, or even assume mastery over it?