Invasion
Invasion is the newest stand alone set. It contains some of the most powerful card in a long time.
These include the new Dragon legends.
Invasion brought back gold cards, and introduced the split cards.
For those of you who like the story lines, this is one of the best books yet. Invasion actually combines the Gerrard and Urza storylines into one giant action packed book. If you want to buy the book you can find it at the magic home page
Kicker
Some cards from this saga have the "Kicker" ability, this is an ability that gives your spells benefits if you pay a little more to play them.
the next expansion in the Invasion cycle is Planeshift
