https://www.gamespot.com/articles/all-the-new-hearthstone-kobolds-and-catacombs-expa/1100-6455393/

The next expansion for Hearthstone: Heroes of Warcraft is now live, but Blizzard first gave players an advance look at all the new cards coming in Kobolds & Catacombs. It has released images of all 135 new cards. You'll find every one of the new additions in the gallery below.

Kobolds & Catacombs will bring new card types such as Spellstones, Unidentified items, and Legendary weapons, all of which have the potential to really shake things up. The expansion will also bring a new single-player mode called Dungeon Run, which Blizzard says has 48 different encounters. This doesn't require you to own any cards and is designed for replayability.