Grim Necromancer is a common neutral minion card that belongs to the "Knights of the Frozen Throne" set, which was released on 10.08.2017 and is one of initially 135 cards. The artist of this card was Dave Allsop, who also made 73 other artworks for Hearthstone.
The flavor text of the card is the following: WARNING: Skeletons will NOT explode.
The card is easy to memorize with 93.33% of correct quiz questions.