Togwaggle's Scheme is a Rogue spell card (rarity: rare) that belongs to the "Rise of Shadows" set, which was released on 09.04.2019 and is one of initially 136 cards. The artist of this card was Konstantin Turovec, who also made 143 other artworks for Hearthstone.
The card costs 1 mana and its card text reads: "Choose a minion. Shuffle 1 copy of it into your deck. (Upgrades each turn!)"
The flavor text of the card is the following: "Many minions equals many treasures for king. Kobold arithmetic!"
Based on 105 quiz answers, the card is easy to memorize: 95% of them were correct. The question on “Name” is answered correctly most often (97%), the one on “Card text” least often (94%). An answer takes 8.8 seconds on average.