The drow (Nezznar the Black Spider) is searching for the Forge of Spells, where the human mages of old Phandalin enchanted dwarven weapons and gnome gadgets. However, Nezznar’s exploration has been hindered by the restless undead and dangerous monsters that lurk in Wave Echo Cave, forcing him to proceed with great caution. The adventurers now have the chance to aid Gundren, avenge his kin, and put a stop to the nefarious schemes of the Black Spider. And of course, the hoard of powerful magic rumored to be hidden in the mines is a rich prize.
Gundren Rockseeker survives the ordeal at Cragmaw Castle, and offers the characters his thanks and asks that they escort him back to Phandalin and then venture to Wave Echo Cave to learn the fate of his brothers, Nundro and Tharden. He knows that someone called the Black Spider orchestrated his capture and hopes that the characters stop the villain. Upon returning to Phandalin, Gundren offers the characters 25 gp each for their assistance and promises the party a 10 percent share of the mine’s wealth once his operation there is up and running.
A young green dragon named Venomfang has recently claimed the tower, having passed over Thundertree while searching Neverwinter Wood for a suitable lair. The giant spider corpses are the former residents of the tower, killed by the dragon after it tore its way through the roof. Since then, Venomfang has been laying low.