Blizzard Entertainment has announced a new expansion for Hearthstone, ominously titled Whispers of the Old Gods.

The new expansion is centered on the four eldritch deities (C’Thun, Yogg-Saron, Y’Shaarj, and N’Zoth) that are known in the Warcraft universe, and it will release sometime in late April, or early May of this year. Featured above, you can view the expanion’s cinematic trailer.

Whispers of the Old Gods adds 134 new cards, with Blizzard giving away three packs of cards to fans who log in during the expansion’s launch period. Blizzard will also give a legendary card, C’Thun (one of the Old Gods), as well as two Beckoner Of Evil cards, to all players.

Here are the expansion’s first six cards:

Fans who pre-order the entire 50-pack bundle (for $49.99) will get an exclusive creepy card back: