Anub'ar Ambusher is a Rogue minion card (rarity: common) that belongs to the "Curse of Naxxramas" set, which was released on 22.07.2014 and is one of initially 30 cards. The artist of this card was Nate Bowden, who also made 7 other artworks for Hearthstone.
The card costs 4 mana, has 5 attack and 5 health, and its card text reads: "Deathrattle: Return a random friendly minion to your hand."
The flavor text of the card is the following: Originally he was called "Anub'ar Guy who bounces a guy back to your hand", but it lacked a certain zing.
Based on 111 quiz answers, the card is moderately hard to memorize: 85% of them were correct. The question on “Cost” is answered correctly most often (89%), the one on “Health” least often (78%). An answer takes 6.3 seconds on average. In the Pixel Quiz, which shows only the shape and colour of the card, it was recognised correctly 71% of the time.