I'm currently running Curse of the Crimson Throne, and I know that a part of Kazavon is placed in Shackles. So I'm kind of interested, did anybody used this plothook?
I'm also a player at my friends Skull&Shackles game, and he's also a player at mine run of CotCT. I think to inform him about Kazavon part in "his region", as soon as CotCT party and his character would have the revelation about Ileosas Crown. Maybe we will think of some sort of over-AP plot for cameos of CotCT characters.
I presented the plot hook, but my players didn't bite. I'll keep reminding them. What would you do if your S&S PCs got the throne?
Well, I'm not the GM, just a player. But Throne strikes me as something for a temporary bad guy to use. After that... Knowing folks with whom I play, they would totally take the Throne on the ship for the captain. Which isn't good, because Throne emphatically will push the guy who's sitting on it to find other parts.
It could be an interesting plot hook for "continuing the adventure".
There is definitely info on it and its hiding place to be found in various source books and could be a cool home-brew adventure.
Putting it in before the end of Book 6 is putting the cart before the horse, though. Also, for an artifact of this stature, PCs should certainly be high level before searching for it anyway. Having fifth level PCs trying to claim it would be an insult or a deathtrap!