Anub'arak is a Rogue minion card (rarity: legendary) that belongs to the "The Grand Tourney" set, which was released on 24.08.2015 and is one of initially 132 cards. The artist of this card was Eric Braddock, who also made 13 other artworks for Hearthstone.
The card costs 8 mana, has 8 attack and 4 health, and its card text reads: "Deathrattle: Summon a 4/4 Nerubian with ‘Deathrattle: Summon Anub'arak.’"
The flavor text of the card is the following: Was actually a pretty nice guy before, you know, the whole Lich King thing.
Based on 28 quiz answers, the card is easy to memorize: 93% of them were correct. The question on “Name” is answered correctly most often (100%), the one on “Attack” least often (89%). An answer takes 5.2 seconds on average. In the Pixel Quiz, which shows only the shape and colour of the card, it was recognised correctly 100% of the time.