I'd love to hear more about this! Post it on the Enhancing Rise of Tiamat thread, maybe?
P.S. If you haven't decided yet what they can do for the Arcane Brotherhood, that seems like an ideal place to insert The Frozen Castle.
Well, as soon as I have it written, yeah. Those sentences were in the present tense for a reason.
What I can tell you right now is that the Thayan portion keeps a large portion of the "tour of the Realms", but tightens the focus to the Sword Coast. For instance, one of the Thayan Exiles knows the *full* details of the ritual being used to summon Tiamat - helpful when planning how to stop it. The Cult knows about this as well. The problem facing the cult assassination team, and the player characters, is that the wizard is now an Avowed Scribe within Candlekeep.
There are three other Thayan Exiles that know the full details of the Dragon Masks (as Tiamat has used them before, for different purposes, a long time ago). The cult *doesn't* know this. These exiled wizards all greatly fear retaliation from their homeland - one's trapped his tower 19 ways to Tenday, another has so many layers of indirection to contact him that sometimes *he's* confused, and the third has put an adventuring company under contract to guard him (and is loaded for demonic bear-tiger-elephants). The characters can offer the protection of the alliance, or the arcane brotherhood. The real problem though, is that by this point, the cult is watching the characters (and all of the Alliance's known agents very carefully). So once the characters start following the trail, the cult won't be far behind them. One wizard is in Neverwinter, another in Waterdeep, and I've been debating where to place the last. Right now, the leading contender is Silverymoon.
As for the Arcane Brotherhood, I haven't looked at Frozen Castle, but given how many cold environment quests are already part of Tyranny of Dragons, I'm leary of it just on that basis. I've debated cribbing something from Princes of the Apocalypse, but right now, I'm leaning towards a quest I'm calling "Rex Elementorum", where the players have to retrieve portions of the purest of each of the 6 elements (i.e. go **deeeep** into each of the Elemental Planes, past the point where genies and other elemental denizens live). And that's about all I have of that.
I'll cross-post this to the http://www.enworld.org/forum/showth...rom-a-DM-spoilers-ahead&p=6843718#post6843718 thread as well.
P.S. Anyone interested in a Jotunmoot writeup or a Red Dragon/Maccath quest (replacing the White Dragon/Maccath quest)?