Curse of Weakness is a Warlock spell 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 Matt Dixon, who also made 302 other artworks for Hearthstone.
The card costs 2 mana and its card text reads: "Echo Give all enemy minions -2 Attack until your next turn."
The flavor text of the card is the following: Warlocks refer to this as a "balance change."
Based on 120 quiz answers, the card is moderately hard to memorize: 89% of them were correct. The question on “Name” is answered correctly most often (93%), the one on “Cost” least often (84%). An answer takes 9.6 seconds on average. In the Pixel Quiz, which shows only the shape and colour of the card, it was recognised correctly 83% of the time.