Mass Polymorph is a epic Mage spell card that belongs to the "Fractured in Alterac Valley" set, which was released on 07.12.2021 and is one of initially 135 cards. The artist of this card was Matt Dixon, who also made 248 other artworks for Hearthstone.
The flavor text of the card is the following: Sheep in Frostwolves' clothing.
The card is easy to memorize with 95.12% of correct quiz questions.