Information on White Plume Mountain

Twenty years ago, three powerful magical weapons were stolen from powerful noble houses in Greyhawk, all on the same night, with no sign of intrusion. It was flawlessly executed, and the houses combined to raise hell in the city trying to recover them. The Thieves’ Guild, normally untouchable, suffered major pains as the nobles cracked down on their activities, but they were not to blame. In a few days, letters were delivered to the families from a wizard named Keraptis, who taunted the families and dared them to try and retrieve them.
Investigation showed that Keraptis was the name of an old Flan sorcerer, who ruled as a tyrant over a city in the south almost 2000 years ago. A known follower of Nerull, he was removed but not killed, and he ended up destroying his former city from his new lair in White Plume Mountain. Upon receiving this information, groups were hired to retrieve these items from Keraptis.
Two of the groups failed and died in their efforts, but some of the third group returned with five weapons: Whelm, Blackrazor (a greatsword said to drink the souls of those it slays), Wave (a trident, the one the surviving group was hired to return), and Frostrazor and Seeker (which were not stolen, but were found with the other three weapons). Whelm, Blackrazor, Seeker, and Frostblade scattered, and Wave was returned to House Dresden in Greyhawk. They claimed to have slain Keraptis in the very heart of the volcanic mountain.

In the last year, each of these weapons has been stolen again, and left in its place, a scroll with the initial K. These jobs were inexpertly done, as some of the precautions were sprung this time around, and they weren’t stolen all on the same night. A few of the theories among the group: someone with knowledge of the other crimes is posing as Keraptis to gather these items; K wasn’t killed, and is gathering them again to return to power; K was killed, but has returned somehow.
Through investigation, the group got into contacted House Dresden. While initially rebuffed, they persisted in snooping around, using their contacts throughout the city. House Dresden finally offered to meet, and after much work and discussion, they offered assistance if they would quest to retrieve Wave for them once again. They have provided a map of the environs around White Plume, located at the western edge of the Great Rift in the Bandit Kingdoms. The travel will be dangerous, the contents of the lair are unknown, and the weapons might not even be there anyway. A finders fee of 10% of Wave’s worth will be offered to those who recover it (as well as all other treasures recovered).