Blizzard is nerfing two Hearthstone cards on September 22; Leeroy Jenkins and Starving Buzzard
Leeroy Jenkins will now cost 5 mana, up from 4, and Starving Buzzard will cost 5 mana, up from 2. Starving Buzzard will also now have Attack 3 and Health 2, up from 2 and 1, respectively.
Here's the reasoning, straight from Blizzard:
"Leeroy Jenkins created a strategy that revolved around trying to defeat your opponent in one turn without requiring any cards on the board. Fighting for board control and battles between minions make an overall game of Hearthstone more fun and compelling, but taking 20+ damage in one turn is not particularly fun or interactive. This was occurring when Leeroy was used in combination with other cards like Power Overwhelming, Faceless Manipulator, Cold Blood, Shadowstep, and Unleash the Hounds, among others.
"The amount of cards Starving Buzzard allowed Hunter players to draw ultimately ended up being too excessive for its low cost. This change will allow the Hunter’s opponent more time to react to both the Starving Buzzard and the cards drawn by its power."