Circle of Healing is a Priest spell card (rarity: common) that belongs to the "Legacy" set. The artist of this card was Daarken, who also made 3 other artworks for Hearthstone.
The card costs 0 mana and its card text reads: "Restore 4 Health to ALL minions."
The flavor text of the card is the following: It isn't really a circle.
Based on 111 quiz answers, the card is easy to memorize: 96% of them were correct. The question on “Name” is answered correctly most often (98%), the one on “Card text” least often (94%). An answer takes 4.3 seconds on average. In the Pixel Quiz, which shows only the shape and colour of the card, it was recognised correctly 100% of the time.