Mark of Nature is a Druid spell card (rarity: common) that belongs to the "Legacy" set. The artist of this card was Clint Langley, who also made 9 other artworks for Hearthstone.
The card costs 3 mana and its card text reads: "Choose One - Give a minion +4 Attack; or +4 Health and Taunt."
The flavor text of the card is the following: Druids call it the "Mark of Nature." Everyone else calls it "needing a bath."
Based on 129 quiz answers, the card is easy to memorize: 91% of them were correct. The question on “Card text” is answered correctly most often (96%), the one on “Cost” least often (85%). An answer takes 5.6 seconds on average. In the Pixel Quiz, which shows only the shape and colour of the card, it was recognised correctly 88% of the time.