Obliterate is a Death Knight spell card (rarity: epic) that belongs to the "Legacy" set. The artist of this card was Dan Scott, who also made 45 other artworks for Hearthstone.
The card costs 2 mana and its card text reads: "Destroy a minion. Deal 3 damage to your hero."
The flavor text of the card is the following: Why is 6 afraid of 7? Because Obliterate 9!
Based on 33 quiz answers, the card is easy to memorize: 94% of them were correct. The question on “Name” is answered correctly most often (100%), the one on “Card text” least often (88%). An answer takes 7.5 seconds on average.