Update 3:35 PM EDT: We've been talking about it and come to similar conclusions to that in the comments.
The Three Card Backs of Karazhan
We've spotted three different card backs which are related to Karazhan in last night's stream. We aren't certain how some of them are rewarded, but we suspect one is for Heroic Mode and the other is for an upcoming ranked play seasonal reward.
- The Blue Portal - Heroic Karazhan Reward
- Medivh's Invitation - August 2016 Reward
- Karazhan Nights - Purchase the whole adventure within one week of launch.
We believe The Blue Portal is the reward for completing Karazhan on Heroic as it is grouped with other heroic card backs on the stream. Additionally, normal mode adventure bosses have always used the "adventure season reward" card back and in the footage we've seen, Medivh's Invitation was used by the boss.
The Blue Portal 
Medivh's Invitation 
Karazhan Nights
Visit our Card Back Gallery
We've updated our card back gallery with all the new card backs. Go take a look!
Visit our One Night in Karazhan Adventure Guide
Looking for info on the newest adventure? Look no further than our adventure guide to Karazhan!
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)I like it
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)FUU, card backs that are made for girls. And the desing is also sh!tty.
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Bro, pink purple and glitter is manly and totally awesome. And the design is totally groovy.
-
View User Profile
-
Send Message
Posted Jul 30, 2016 (Old Gods)I didnt know that hearthstone truely had children playing
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Im using legend card back not gonna change it but madiv invitation card back seems cool
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)I am suffering from new stuff withdrawal. SHOW ME ALL TEH CARDS!!!!!!!!!!!
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Looks like something a bunch of 8 year old girls would come up with at craft time.
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)I know, isn't AWESOME?
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)needs...more...SPARKLES!!
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Is it just me or does the Medivh's Invitation August card back looks like certain lady parts with HS logo on them ?:D
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)lol you have a Wild imagination :D i can see your visioning!
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Looks like a pretty standard old-skool postal stamp to me..
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Have you ever seen lady parts? Obviously not.
That's a wax seal. Something they did to seal notes and envelopes back in the old days (pre-1900s). https://en.wikipedia.org/wiki/Sealing_wax
-
View User Profile
-
Send Message
Posted Jul 30, 2016 (Old Gods)I know that, but i have a wild imagination :P
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Huh. Fair card backs. Let's see how the heroic will look like.
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)I really need to see the Blue Portal cardback animated. I am anticipating it looking cool as hell.
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Normal BRM bosses don't use heroic card back, but the card back that was released in the same month BRM was, so probably the blue portal gonna be the heroic mode, right?
@edit: never mind, someone already pointed that out.
-
View User Profile
-
Send Message
Posted Jul 29, 2016 (Old Gods)Great, another card back that will be used for a while until the next best thing come out, if only we could use a random card back every game, but i guess....the technologie isn't there yet.