There are no Heroic rewards for any adventure bosses. What cards did you seem to receive for beating Heroic Zinaar?
djinni of zephyrs and jeweled scarab
As Killer548 said, those are the rewards for a Normal Mode victory against Zinaar. I'm not sure what would have caused you to not receive them and then receive them there, but it could have just been a visual bug.
what content is from beating the two bosses
There are no Heroic rewards for any adventure bosses. What cards did you seem to receive for beating Heroic Zinaar?
You can find me here! Good luck everyone!
You can find me here! Good luck everyone!
Basic/gold rewards?