Hero cards are an all new type of Hearthstone card being introduced in Knights of the Frozen Throne. They are the only new card type to have been introduced after the game's release joining minions, spells, and weapons. Each hero card comes with its own Battlecry, five Armor, and a new hero power. The first revealed hero card was Deathstalker Rexxar.
Hero cards will not take into account your class or hero skin. Playing Deathstalker Rexxar as Alleria, Anduin, or Jaina will result in you becoming Deathstalker Rexxar.
Hero cards will be available in the Arena and each comes with all new emotes to spam.
Not all heroes will be 6-cost though the Druid hero card did let players choose between 0 or 10 armor in an early design. Donais says, "It feels like a space we could explore again some day and use different numbers."
Here's a video preview of a hero card being played.
Knights of the Frozen Throne
Want to learn more about Hearthstone's upcoming Knights of the Frozen Throne? Head on over to our expansion guide.