Sudden Betrayal is a common Rogue spell 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 Matt Dixon, who also made 295 other artworks for Hearthstone.
The flavor text of the card is the following: You thought he was your bro-bold, but turns out he's your foe-bold.
The card is easy to memorize with 95.83% of correct quiz questions.
