Blizzcon is now officially under way so we can officially reveal the second World of Warcraft expansion pack; and here's a set of World of Warcraft: Wrath of the Lich King screenshots and artwork to tweak your interest. At present there's no news regarding a release date.

"This expansion will add some of the most infamous characters and settings from the Warcraft® universe to World of Warcraft," said Mike Morhaime, president and cofounder of Blizzard Entertainment®. "In addition to new story content, Wrath of the Lich King will introduce a number of features specifically requested by players over the past couple of years. We’re looking forward to sharing further details with everyone as development progresses."

Players last visited Northrend in Warcraft III: The Frozen ThroneTM, when Arthas Menethil fused with the spirit of Ner’zhul to become the Lich King, one of the most powerful beings in the Warcraft universe. He now broods atop the Frozen Throne deep in Icecrown Citadel, clutching the rune blade Frostmourne and marshaling the undead armies of the Scourge. In Wrath of the Lich King, the forces of the Alliance and the Horde will venture into battle against the Scourge amid Northrend’s howling winds and fields of jagged ice.

Building on the foundation established in World of Warcraft and The Burning Crusade, Wrath of the Lich King will add a rich variety of content to an already massive game. New features coming with the game’s second expansion include:
• Death Knight Hero Class: Create a high-level Death Knight character -- the game’s first hero class -- once certain challenges have been met.
• Increased Level Cap: Advance to level 80 and gain potent new talents and abilities along the way.
• Northrend: Explore the harsh new continent of Northrend, packed with new zones, quests, dungeons, monsters, and items -- and do battle with the undead armies of the Lich King.
• "Inscription" Profession: Learn this exciting new profession and gain unique ways to permanently enhance spells and abilities in the game.
• Siege Weapons and Destructible Buildings: Take the battle to another level with new player-vs.-player game mechanics and new battlefields to wage war on.
• New Character Customization: Change how characters look and express themselves, with different hairstyles and dance animations.