Kor'kron Elite is a free Warrior minion card that belongs to the "Legacy" set. The artist of this card was Alex Horley Orlandelli, who also made 156 other artworks for Hearthstone.
The flavor text of the card is the following: The Kor'kron are the elite forces of Garrosh Hellscream. Let's just say you don't want to run into these guys while wearing a blue tabard.
The card is easy to memorize with 98.06% of correct quiz questions.