Impossible to complete "Return of the Hero" questline

[SuddenReal-2703]

How to share links to screenshots, videos, and replays

You may have noticed that sharing any URL links will be disabled in some instances when replying to a post. There is a work around that will allow you to share links to screenshots, videos, and replays. You can use either the Preformatted text option (the button with </>) or the Blockquotes button ("). It will display the link as shown in the examples below: (Preformatted Text) https://www.playhearthstone.com (Blockquotes) https://www.playhearthstone.com

Anyway, as far as I can tell, you just need to play a normal game of Hearthstone. Try playing Ranked (I suggest as Warrior or Rogue, so you can complete those two other quests as well).