Libram of Wisdom is a rare Paladin spell card that belongs to the "Ashes of Outland" set, which was released on 07.04.2020 and is one of initially 135 cards. The artist of this card was Adam Byrne, who also made 38 other artworks for Hearthstone.
The card costs 2 mana and its card text reads: "Give a minion +1/+1 and ‘Deathrattle: Add a 'Libram of Wisdom' spell to your hand.’"
The flavor text of the card is the following: The best wisdom is passed on.
Based on 89 quiz answers, the card is easy to memorize: 92.13% of them were correct.