Blitz

Could someone tell me it's description, how effective it is, and how to use it?

Enter this link - http://afterwind.com/forum/topic.php?topic_id=2495
it will help

It gives +3 movement +2 view range and -2 defence to all units, it's a very offensive and fast strategy but you'll have bad defence if you use it so you need to wall every city.

Thanks!