| Alfieatheria |
Okay, am I the only one who reads the title of this module... and then the concept of the Doomsday Door and thinks of that episode of The Real Ghostbusters? It's called Knock, Knock.
Subway tunnel excavators uncover a mysterious ancient door buried far beneath New York City. Upon the door is a demonic face that intones, with an echoing voice:
"Do Not Open Until Doomsday!"
Of course, its dire warning is ignored. Bad things are behind the door.
I love that episode.
OMG I also had this flash back, I just couldn't recall which episode it was! I read through it briefly, I try to scan all new material, were not in this adventure yet, so were safe.
As for the crystal, its a magic item, its possible it would just drop, would appear on its own. If they miss it, I would have a animal companion save it, or a npc , over all its what ever feels good to you as a gm, and not to clique with your group.