When it comes to creating addictive gaming experiences, Blizzard -- the diabolical geniuses behind the most popular MMO on the planet, World of Warcraft, among other titles -- are certainly masters. Its latest digital drug, which also happens to carry the Warcraft brand, is a virtual strategy card game called Hearthstone: Heroes of Warcraft, and it's currently in closed beta testing. But despite not being officially "finished," the game is an utter treat to play, and it just might be your new addiction.
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