Velmont
First Post
There have been signs of a growing planar instability deep in the underdark, possibly linked to the site of Lolth's death. Her physical body will have ended somewhere in the Astral Sea, but the location of her death will be a reservoir of power. The Priest, wizard and perhaps even the warlord (ritualist) will have noticed or received warnings that something is going on, it it will only be getting worse unless it is dealt with. You have called together those you trust, who can can handle such a venture.
A suggestion, as a god die, the powers related of her portfolio is released from her power and become uncontrolled. So a portal from the plane of shadow could have been open, spiders could have establish themselves there and grow to never seen before strength, a compulsive force make evryone there goes paranoid and force the people to turn upon there friends, ect...
The drows would have detect that and would want to close teh protal, but probably a few more power hungry would try to tap into that power for themselves or there house.