ハースストーンを1年続けると攻撃的になるという研究結果が出ました
https://us.battle.net/forums/ja/hearthstone/topic/19496930071?page=50#post-991
https://us.battle.net/forums/ja/hearthstone/topic/19745645101?page=46#post-903
https://us.battle.net/forums/ja/hearthstone/topic/19745645101?page=46#post-907
　↓
https://playhearthstone.com/ja-jp/blog/21758133/