The Caverns Below is a legendary Rogue spell card that belongs to the "Journey to Un'Goro" set, which was released on 06.04.2017 and is one of initially 135 cards. The artist of this card was James Ryman, who also made 285 other artworks for Hearthstone.
The flavor text of the card is the following: Why can't it ever be The Taverns Below?
The card is easy to memorize with 94.12% of correct quiz questions.