When using the earth pound (special attack), hold the square button while in the air. When you reach the ground you should do two quick rotations of your earth flail. This combo is pretty good at hitting groups of oponents. But only use this combo if the enemys your fighting are actually knocked into the air by the earth pound. If not, then it will leave you wide open for attack for not even a second. It doesn't sound like much, but you can still get hit in that time and then the combo will be ruined.