Currently the party was sent to the Underdark. Specifically to the drow city of Phaerovoul. The drow city is under siege by Orcus. The party was told by Dana, a succubus, that somewhere in Phaerovoul is the remaining cards for the Deck of Many Things.
The journey took the party several months to reach the city. They found the city to be under siege by undead. The drow do not appear to pay attention to the party.