http://tw.battle.net/hearthstone/zh/blog/19819218/
竞技场奖励更新
在《银白联赛》推出之后，竞技场的玩家奖励将不只限于《哥哥打地地》卡牌包。玩家将
有机会得到《银白联赛》、《哥哥打地地》 或经典卡牌包作为奖励。
Arena Reward Update
Beginning with the launch of The Grand Tournament, the Arena will no longer
award players only Goblins vs Gnomes card packs. Instead, players will have a
chance to receive a Grand Tournament card pack, Goblins vs Gnomes card pack,
or a Classic card pack whenever a pack is awarded.