Warcraft 25th anniversary – Event gives free golden cards!

In the official patch notes for the 15.6 Patch, Hearthstone announced a Warcraft Anniversary celebration event, we know know what we will get (Source)

Login Rewards – Free Cards

Logging in during the anniversary event will reward players with two cards.

Injured Blademaster

One Golden Injured Blademaster

Argent Commander

One Golden Argent Commander

New Tavern Brawl Chalkboards

Three new chalkboards were added with the patch, maybe some of them off them are for the event

Chalkboard 1