DOOM! is a Warlock spell card (rarity: epic) that belongs to the "Whispers of the Old Gods" set, which was released on 26.04.2016 and is one of initially 134 cards. The artist of this card was Raymond Swanland, who also made 33 other artworks for Hearthstone.
The card costs 10 mana and its card text reads: "Destroy all minions. Draw a card for each."
The flavor text of the card is the following: We ran out of space for "DOOOOOOOOOOOM!!!!!"
Based on 97 quiz answers, the card is easy to memorize: 99% of them were correct. The question on “Cost” is answered correctly most often (100%), the one on “Card text” least often (97%). 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 100% of the time.