Thrive in the Shadows is a rare Priest spell card that belongs to the current "Core" set. The artist of this card was Patrik Bjorkstrom, who also made 72 other artworks for Hearthstone.
The flavor text of the card is the following: Why would your spells be afraid of the dark? It's easier to nap there.
The card is on average to memorize with 89.23% of correct quiz questions.