Call of the Void is a common Warlock spell card that belongs to the "Legacy" set. The artist of this card was Arthur Gimaldinov, who also made 69 other artworks for Hearthstone.
The flavor text of the card is the following: "Marco!" "Polo!" "Marco!" "Who dares summon me?!"
The card is easy to memorize with 93.83% of correct quiz questions.
