This land deals 2 damage to you
The thing with Courser is that it is just so good, you would play it in most decks even without any life gain
Even if you only get a few cards off him, he's a pretty good draw engine in a Jund shell, and even as a commander he can definitely do a lot of work - he restricts what you reasonably might want to use your removal on, but turning all your removal into cantrips is quite a scary thing when he also provides a reasonable win condition on his own
However, Cavalier is much better than Grey Knight thanks to its ability to destroy any nonland permanent instead of just attacking creatures
For this set, you can expect new franchise debuts, as well as a neat new product: a pre-release kit that contains a special promo card, a random postcard, a deck box and six Wilds Unknown boosters.