The company says that other classes are catching up
Eric Dodds, the lead designer working on Hearthstone, says that at the moment the Druid class is being used by most of the high-level players, but the game’s dynamic nature means that the situation might change very quickly.He tells Eurogamer that, “Right now there's a lot of Druids at a high level, but there's been a swing of other classes - people finding out how to beat that deck. Even now they seem to be on the downward swing and losing that top status.”
The Druid class has access to a lot of spells and also gets a boost to mana, which appeals to a high number of players.
Hearthstone is a card-driven experience that uses a variety of magic attacks and units drawn from the World of Warcraft universe.
Blizzard plans to expand it with a new Adventure mode and might add more classes in the future.