Dungeons & Dragons Online: Menace of the Underdark

Summary pulled directly from Steam - Some text may only be applicable to Steam platform

The shadow of Lolth has cast darkness over the kingdom of Cormyr where heroes struggle to stem the unrelenting tide of the Drow forces. The hopes of the Realms lie with champions from Eberron, whose world has become entangled in Lolth's schemes, bringing them to Faerun where they will make the final stand against the Queen of the Demonweb!

Three All-New Adventure Packs: Dive into three Forgotten Realms adventure packs that will send you exploring through the expansive King’s Forest, delving into the treacherous Underdark, and into the Demonweb – Lolth’s home plane!
Druid Class: Harness the powerful shape-shifting powers and nature magic of the new Druid class!
Epic Destinies: Build your characters to new heights of power with Epic Destinies, new epic character enhancements, as you advance to level 25!
Eveningstar Challenge Pack: Experience new Forgotten Realms challenge quests designed specifically for the Menace of the Underdark expansion pack!