Beginner Teaching Decks
This series of casual decks is designed to teach Magic to new players in the best way possible. Each color deck is a "real" constructed deck: the card choices are very deliberate and work together to highlight a play style typical for that color. The new player is meant to start with the and decks. As they learn the game mechanics, they then progress to play the other colors, which increase a little in complexity. A LOT of work has gone into balancing the decks, so that any one of them is an interesting match-up against the others.
Because this is meant to try to "capture" new players and sell them on the game, there is a focus on good art and low prices. Each deck is meant to work as a cohesive unit, so the new player is indirectly exposed to deck brewing concepts. The card text is kept as simple as possible, so the new player can focus on learning the game.