Secret in Hearthstone!

[Avilion]

Secret (Bug) added in new patch Curse of Naxxramas.

1) Open Hearthstone
2) Select in menu Adventure mode
3) Select Training, normal mode
4) In the selection of the deck, on numpad press one of the three buttons

"/" - challenge missions.
"*" - bosses of Naxxramas (Normal)
"-" - bosses of Naxxramas (Heroic)

By clicking on the boss you start a fight with him.

If the selected block boss is not available, you will see (hear) quote Kel'Thuzad.

[Bippy]

I love little things like these. +5. Good job

[lordimac]

Useless, but I like it.

[morgoy]

And the more you press one of the three buttons, the brighter it gets

Edit: Doesn't seem to work anymore