Mad Hatter is a neutral minion card (rarity: rare) that belongs to the "The Witchwood" set, which was released on 12.04.2018 and is one of initially 135 cards. The artist of this card was Jim Nelson, who also made 124 other artworks for Hearthstone.
The card costs 4 mana, has 3 attack and 2 health, and its card text reads: "Battlecry: Randomly toss 3 hats to other minions. Each hat gives +1/+1."
The flavor text of the card is the following: He's entirely bonkers. All the best goblins are.
Based on 100 quiz answers, the card is moderately hard to memorize: 81% of them were correct. The question on “Name” is answered correctly most often (96%), the one on “Cost” least often (63%). 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 90% of the time.