I'm a novice Hearthstone player and I have seen that there are currently three collectible heroes to buy: a warrior, a hunter and a mage.
However, when matching random games in Constructed play, I have seen players that have another hero that is not in the shop list, a female Paladin.
I really love that character, so I investigated and discovered that the way to acquire that Hero is by joining WOW game and leveling up a character to level 20 (a paid account is not needed to do it from what I have seen.)
Please now let me ask some questions which are closely related to each other to help me understand this:
At this precise time, on 29/June/2016, am I still able to join WOW to acquire the female Paladin reward?. (it seems that it had a time limit that ended in March, but I'm not sure.)
Are there more heroes that are not in the shop list and require special actions to acquire them?. (please, give full hero names or links with further documentation.)