Corrosive Sludge is a common neutral minion card that belongs to the "Kobolds & Catacombs" set, which was released on 07.12.2017 and is one of initially 135 cards. The artist of this card was Luca Zontini, who also made 63 other artworks for Hearthstone.
The flavor text of the card is the following: The result of centuries of terrible sanitation.
The card is easy to memorize with 91.49% of correct quiz questions.