From the PDF introduction
A White Plume Mountain (Revised) Web Enhancement
White Plume Mountain was one of the classic DUNGEONS & DRAGONS adventures from the early days of first edition, and I remember my times exploring this dangerous mountain. Now that you have access to it in the newest edition of D&D, new generations of players have the chance at those same thrills. As a Dungeon Master, you might wish to use White Plume Mountain as the centerpiece for a campaign, or at least for an
extended setting for your heroes to explore. To do this, you’ll look to the Great Swamp that surrounds White Plume Mountain, and perhaps to the mountains farther away, for additional quests and encounters to challenge your heroes.
The AD&D 2nd Edition adventure Return to White Plume Mountain introduced additional material into the region surrounding the mountain itself, including a new weapon and the Witch of the Fens, Thingizzard. Here below you will find Frostrazor, the fourth legacy weapon, and Thingizzard, converted to D&D 3.5. Additionally, consider using Dragotha the Undead Dragon (a dracolich) as a threat to be introduced now and battled later; he was introduced in the online adventure Dragotha’s Lair. With these three, you can provide weeks of fun (or headache) for your players.