Defile is a rare Warlock spell 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 75 other artworks for Hearthstone.
The flavor text of the card is the following: This spell was originally designed to help warlocks clean up their hard drives.
The card is easy to memorize with 97.66% of correct quiz questions.
