"In this world nothing can be said to be certain, except death and taxes."
Classic words that fits this deck perfectly! First you tax your opponent with Land Tax and then you make his or her death swift with the help of Land's Edge. Or to put it in Magic terms, you keep your land count lower than the opponents so that you can activate Land Tax over and over again to fill your hand with lands. Then you use Land's Edge to throw those lands at your opponent face. This is the foundation of the deck but the other part you can build in two different ways.
One way to go is to play cards like Swords to Plowshares, Disenchants and Ivory Tower to keep you alive until you can kill your opponent with the combo. The other way to build the deck as an aggro deck with a bunch of small creatures and Lightning Bolts and use the combo as the finisher.
Another card that can be played is Winds of Change, as it lets you exchange the lands in your hand to actual cards.