Blizzard
We're pleased to inform you that anyone that's toppled 100 Play mode opponents in Hearthstone can now claim the Cardback Mount reward mentioned below.
In order to do this, simply log in to Hearthstone to complete the Easy Rider Quest, and then fire up Heroes of the Storm to receive your new Mount! Please also note that the Cardback Mount may take up to 24 hours to appear in your Heroes Mount collection.