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.
紅龍 艾薩拉女王 米歐 霍格 因為平衡因素暫時禁用
[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‧風行者 因為平衡因素在雙打模式暫時禁用