Okay, good news and bad news.
GREAT NEWS is that the Dracolich did not yet recharge his breath weapon.
Of course, the BAD NEWS is his ice-fort is filled with obscuring, hazardous terrain. Specifically Heavy Obscurement. I don't know if the EYE can see through that. If not, Primus can still TP everyone on top of the SPINE (either on that white square or the lighter gray stuff near the eye). The Dracolich itself will have plunged into obscurement (consider the blueish ice-walls to be the limits of the obscurement). So no TPing anyone directly adjacent, but they can jump down into the area themselves (though it's so cold you'll take damage - AND you'll be effectively blind. Even the lights won't pierce that dense fog.) Still, you'd still be able to attack, just with disadvantage. Staying on the ridge and shooting into the fog will work too, still at disadvantage.
Doesn't everyone wish that Lorenn knew Gust of Wind?
The other good news is that Primus can see everyone, I think (I mean, obviously not Mord or the Trolls or anything) but even Alhana is in line-of-sight of him (she can just be seen around the higher shelf, in Loklafd's torch-light). Sesto's light, and even Lorenn's Sphere keep everyone else in view, too.
Any questions? I assume we're all gonna let
@tglassy Primus go first and teleport everyone, even if they're busy fighting, right?