The drow worship Lolth, a deity who resides in the Abyss. Known as the Spider Queen or the Demon Queen of Spiders, she is the figure around which the dark elves have built their subterranean civilization. Whatever she demands, the drow do.
The wickedest of elves, drow are seldom seen by the surface world. Though they plot to destroy the elves that banished them, they no longer see themselves as exiles. They are destined rulers of the darkness, and when Lolth commands them to rise up and destroy their surface-dwelling kin, they will.