Power Overwhelming is a Warlock spell card (rarity: common) that belongs to the "Legacy" set. The artist of this card was Tom Baxa, who also made 3 other artworks for Hearthstone.
The card costs 1 mana and its card text reads: "Give a friendly minion +4/+4 until end of turn. Then, it dies. Horribly."
The flavor text of the card is the following: We cannot even describe how horrible the death is. It's CRAZY bad! Maybe worse than that. Just don't do it.
Based on 133 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 “Name” least often (89%). An answer takes 5.5 seconds on average. In the Pixel Quiz, which shows only the shape and colour of the card, it was recognised correctly 75% of the time.