Blessing of Kings is a Paladin spell card (rarity: free) that belongs to the "Legacy" set. The artist of this card was Lucas Graciano, who also made 7 other artworks for Hearthstone.
The card costs 4 mana and its card text reads: "Give a minion +4/+4. (+4 Attack/+4 Health)"
The flavor text of the card is the following: Given the number of kings who have been assassinated, are you sure you want their blessing?
Based on 142 quiz answers, the card is easy to memorize: 95% of them were correct. The question on “Card text” is answered correctly most often (100%), the one on “Cost” least often (93%). An answer takes 4.2 seconds on average.