The Alliance archmage Jaina Proudmoore and former Horde Warchief Thrall have a mutual respect and trust with each other in the Warcraft universe, but that doesn't keep them from facing off in a new video showing Hearthstone: Heroes of Warcraft in action.

The shoutcasted "fireside duel" pits the mage and shaman against each other in Blizzard's upcoming free-to-play online collectible card game. In it, you'll see players use cards with many of the traditional spells found in the Warcarft universe, as well as cards for other personalities in the game, such as Malygos, Hogger and Archmage Antonidas.

We won't spoil the battle, so check out the battle below. In case you missed it, Steve has previewed the game, which is coming later this year to PC and iPad.