Sigil of Summoning is a rare Demon Hunter spell card that belongs to the "Wailing Caverns" addition of the "Forged in the Barrens" set. It was released on 02.06.2021 and is one of initially 35 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: Look, summoning ain’t exactly a science. Sometimes it takes a turn.
The card is easy to memorize with 91.43% of correct quiz questions.