Curious Glimmerroot is a Priest minion card (rarity: epic) that belongs to the "Journey to Un'Goro" set, which was released on 06.04.2017 and is one of initially 135 cards. The artist of this card was Servando Lupini, who also made 5 other artworks for Hearthstone.
The card costs 3 mana, has 3 attack and 4 health, and its card text reads: "Battlecry: Look at 3 cards. Guess which one started in your opponent's deck to get a copy of it."
The flavor text of the card is the following: George promised to be good. But it's easy for little Glimmerroots to forget.
Based on 76 quiz answers, the card is easy to memorize: 93% of them were correct. The question on “Cost” is answered correctly most often (100%), the one on “Health” least often (76%). An answer takes 5.9 seconds on average.