A new legendary coming to Hearthstone next week appears to have been leaked earlier by the Chinese site that was meant to reveal it tomorrow.
The card is part of The Boomsday Project, the game's next expansion that arrives in game in seven days' time.
The card was leaked and posted on Reddit earlier today, before being translated by Chinese Hearthstone community leader Chua Zhihong.
Assuming it's accurate, it's a five mana 4/4 that draws five Secrets from your deck when played. Obviously that means it's only really viable in four classes—Hunter, Rogue, Paladin, and Mage. Maybe it could see play in Paladin, but Hunter is more likely a home for it. Secret Hunter has been a viable deck for a while and this with Cloaked Huntress is pretty powerful.
This will also have an effect on Deathstalker Rexxar as all beasts do. A deck running Rexxar is unlikely to want to draw Secrets.
The Boomsday Project is the second expansion of the current Standard year, the Year of the Raven. It will add 135 new cards to the game, including new keywords like Magnetic. It is currently available to pre-order, with all the cards becoming available on Aug. 7.