The newest Hearthstone expansion, Knights of the Frozen Throne, is just a month away, and Blizzard has started teasing the game's new legendary cards through Twitter. As of now, the Hearthstone legendary cards unveiled so far are Prince Keleseth, Prince Taldaram, and Blood-Queen Lana'thel. While the first two are are little more versatile, the Blood-Queen is much more specific, designed to work beautifully with Warlock cards that force players to discard.

Fans of World of Warcraft might recognize these characters from the popular Wrath of the Lich King expansion, where Prince Keleseth is the first boss of the Utgarde Keep dungeon, and Prince Taldaram is the second boss of Ahn'kahet: The Old Kingdom. Blood-Queen Lana'thel is the last boss of the Crimson Hall of Icecrown Citadel, one of the final areas heroes must fight through before facing the Lich King himself.

There have also been a few non-legendary cards revealed as well, and there are surely more on the way as the expansion comes closer to release. For more on what's been disclosed thus far, check out Hearthstone's official Twitter.

In the new expansion, Hearthstone will be returning to a popular storyline in Warcraft lore. The Lich King is one of its most popular villains, and Knights of the Frozen Throne is based on his legacy, but the Hearthstone expansion manages to add its own twist. It doesn't introduce a new hero class, but it does turn existing classes into Death Knights, which alters their powers to fit their new, undead personas. It's interesting to see what these classic characters would be like if they served the Lich King.

Recently, Hearthstone has come under fire for its pricing. Many felt the free-to-play game required some monetary investment to actually succeed against other players -- especially this far into the game's lifecycle. Additionally, players began to notice a higher rate of duplicates in card packs they opened. This prompted an experiment that estimated an average cost of $400 to get all of the new cards available in Hearthstone's most recent expansion, Journey to Un'Goro.

Thankfully, Blizzard is taking these complaints to heart. Knights of the Frozen Throne will be comprised of eight missions, which will be entirely free to all players. The missions will also reward players with free packs and a Death Knight legendary for completing them.

Hearthstone: Knights of the Frozen Throne will be out in early August, and will be available on PC, Mac, and iOS and Android mobile devices.

Source: PlayHearthstone – Twitter