Triple Sevens is a Rogue spell card (rarity: common) that belongs to the "Showdown in the Badlands" set, which was released on 14.11.2023 and is one of initially 145 cards. The artist of this card was Matt Dixon, who also made 302 other artworks for Hearthstone.
The card costs 7 mana and its card text reads: "Deal 7 damage to a minion. Draw 7 cards."
The flavor text of the card is the following: If you count the 'seven' in the name, there's actually four total 7s, not three. Huge oversight from the designers.
Based on 27 quiz answers, the card is easy to memorize: 93% of them were correct. The question on “Name” is answered correctly most often (100%), the one on “Cost” least often (83%). An answer takes 3.9 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.