Mad Scientist is a neutral 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 James Ryman, who also made 287 other artworks for Hearthstone.
The card costs 2 mana, has 2 attack and 2 health, and its card text reads: "Deathrattle: Put a Secret from your deck into the battlefield."
The flavor text of the card is the following: His mother wanted him to be a mage or a warlock, but noooooooo, he had to go and be a scientist like his father.
Based on 95 quiz answers, the card is easy to memorize: 96% of them were correct. The question on “Health” is answered correctly most often (100%), the one on “Attack” least often (90%). An answer takes 4.4 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.