Plague Scientist is a Rogue minion card (rarity: common) that belongs to the "Knights of the Frozen Throne" set, which was released on 10.08.2017 and is one of initially 135 cards. The artist of this card was Dave Allsop, who also made 75 other artworks for Hearthstone.
The card costs 3 mana, has 2 attack and 3 health, and its card text reads: "Combo: Give a friendly minion Poisonous."
The flavor text of the card is the following: The excruciating pain means it's working!
Based on 135 quiz answers, the card is moderately hard to memorize: 88% of them were correct. The question on “Card text” is answered correctly most often (96%), the one on “Health” least often (78%). An answer takes 6.9 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.