Ethereal Arcanist is a rare Mage minion card that belongs to the "Legacy" set. The artist of this card was Michael Komarck, who also made 4 other artworks for Hearthstone.
The flavor text of the card is the following: The ethereals are wrapped in cloth to give form to their non-corporeal bodies. Also because it's nice and soft.
The card is on average to memorize with 87.37% of correct quiz questions.