I didn't make it!
It's from Blizzard (on the off chance that anybody here lives in a nursing home and doesn't know which company Blizzard is, it's the one owning World of Warcraft), and it features 9 heroes, each representing one Warcraft class. These heroes are: Mage (your starter heroine, Jaina Proudmoore) Paladin (Uther Lightbringer) Rogue (Valeera Sanguinar) Warrior (Garrosh Hellscream) Warlock (Gul'dan) Priest (Anduin Wrynn) Druid (Malfurion Stormrage) Hunter (Rexxar) Shaman (Thrall) Anyway, all these heroes gather into an Inn and play cards against one another. Story-wise it's not a great game (there's next to no story), but it isn't the point. It's a turn-based game featuring Minion (monster) cards and Magic (spell, duh) cards. Each hero starts with 30 Health, and the point of the game is to get one hero to 0 Health. You summon minions and cast spells in order to accomplish this. There are a ton of different cards to choose from and place in your 30-card deck, and it requires quite a bit of strategy to win. I suggest this to anybody who is looking for a good strategy/magic card game to have a lot of fun. I certainly did, and it's free.