Rat Trap is a Hunter spell card (rarity: epic) 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 Anton Zemskov, who also made 128 other artworks for Hearthstone.
The card costs 2 mana and its card text reads: "Secret: After your opponent plays three cards in a turn, summon a 6/6 Rat."
The flavor text of the card is the following: MISSING: One giant rat. Please return to King Togwaggle.
Based on 133 quiz answers, the card is easy to memorize: 97% of them were correct. The question on “Name” is answered correctly most often (100%), the one on “Cost” least often (95%). 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.