Once in play, a land can be tapped -- used up for that turn -- to generate a mana of that color, and mana is used to play the rest of the cards in your deck
Graded Population Report: Flapple V #7 Visualize the distrbution of grades in the chart
But it also helps to force through creatures like Azure Beastbinder with strong attack triggers, and multiple land drops (perhaps form a fetch land, or a Scapeshift) turn this into a late-game threat that wins easily
This final mistake caused the front to appear both inverted and misaligned in relation to the correctly-positioned back
The sneaky thing about this card is that after its effect of giving escape to all of your nonland cards, it also can be recurred
To show how efficient this card is for the right deck, the final versions of Miracle Grow, which were dubbed Super Grow, used Mystic Enforcer as a finisher, since by the time you'd get around to casting it you had an all but guaranteed 6/6 flyer for four mana