https://us.forums.blizzard.com/en/hearthstone/t/296-known-issues/130187
[Added 7/15] Alexstrasza, Queen Azshara, Millhouse Manastorm, and Cap’n
Hoggarr have been temporarily removed from the Hero Pool for balance reasons.
红龙 艾萨拉女王 米欧 霍格 因为平衡因素暂时禁用
[Added 7/15] Madam Goya and Sylvanas Windrunner have been temporarily removed
from the Duos Hero Pool for balance reasons.
苟雅女士 希瓦娜斯‧风行者 因为平衡因素在双打模式暂时禁用