Update: Details of the planned changes have been posted on the Hearthstone subreddit. This update is completely server-side and does not require a download.

"We wanted to implement this change today, and in doing so, the new status of these cards (which will be shown in both red and green) will only be shown in matches, not collections," Blizzard said.

"The red and green values will revert to white, and the cards will be updated to collections in a data-only patch.

Blizzard will also be reducing the offering rates for the following Demon Hunter cards in Arena "until we can properly address this class with more precise micro-adjustments in a future patch."

Blizzard stated that it will continue to monitor and adjust the class as needed "to bring Demon Hunter closer to what it should be."

Original Story

Hearthstone's Ashes of Outland expansion went live Tuesday, adding a new class, the Demon Hunter, for the first time since its debut in 2014. Today, Senior Designer Dean Ayala said that nerfs are on the way, as the newcomers to Illidan Storm Rage are getting a little too much heat.

Hearthstone forums began voicing complaints about the new class shortly after the update was implemented. Tonquikei, for example, stated in this thread that prior to the release of Ashes of Outland, four classes had a win rate of 50-52 percent, while the other five classes were in the 47-50 percent range.

"DH is so good that it has pushed the win rate of every other class in the game below the level needed to rise. A 58 percent win rate for one class and 49 percent for the next highest class is a serious problem that needs to be addressed ASAP," they wrote.

"DH does it all. They can't beat the tempo early in the game, and even if they somehow survive late in the game, they struggle to find value. This class has so many options that playing against them feels like playing against an adventure boss like Lich King in Heroic."

Hearthstone player F2K_Zeddy described the issue more succinctly on Twitter:

The situation is serious and Blizzard hopes to issue a patch today. The "fastest nerf ever" following last year's Descent of Dragons expansion took over a week to actually roll out.

Along with the direct changes to the card, Blizzard is also adjusting Demon Hunter in Arena to down-tune cards that give Demon Hunter too much "do-it-all" ability, while keeping the "class-defining parts" powerful Ayala stated that changes will be made to the class with the goal of.

"Expect to see a lot of balancing in the coming weeks, and we'll be making changes a little more frequently until DH feels fun, unique, and balanced," Ayala said.

"Later next week, we're planning another patch that will address the changes we want to make to the build, the competition, and the arena.