Blizzard has sent out emails inviting media companies to join them in a special Hearthstone stream event on Twitch next week. The stream will broadcast on Hearthstone’s official Twitch channel on July 28, at 11:00 p.m. PT.

“We would be honored if you would join us for a once-in-a-lifetime event that will be full of magic and celebration,” said the invite (via Polygon). “We also have something very special in store for you!”

“Please be prompt, as we have an unforgettable adventure planned,” the email continued.

Below you can see an image of the invite:

Hearthstone invite

Whether the stream will announce an upcoming expansion for the game or alternative changes is currently unknown. Stay tuned to our coverage on the “once-in-a-lifetime event” for more information.

Whispers of the Old Gods, the game’s latest expansion, released nearly three months ago; it wouldn’t be out the question to speculate the announcement of some considerably significant add-on content next week.

In other Hearthstone-related news, a new hero, Morgl the Oracle, for the Shaman class is available now and can be obtained through a recruit-a-friend process.

Hearthstone is available for Android, iOS, Microsoft Windows, and Mac. It was originally released March of 2014, initially exclusive to PC.

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