United in Stormwind Cards List & Guide
Patch notes said you can now see missing tribes by hovering over deck but it didn't work for me.
Hovering during hero select for me is bugged and I have to figure old way which ones are missing, anyone else with this problem?
you should hover your curser on bob's deck not yours you don't have a deck.
I found you can't see whats missing while choosing a hero.... what a bummer
if you use Deck Tracker then just click on any tier and there you can see 'unavailable tribes' below - even while choosing your hero (just a hint)
Mimsy Were The Borogoves